裴波那契数列第100个 数值是多少?

裴波那契数列第100个 数值是多少?
如题

a[1] = 1,a[2] = 1,a[3] = 2,a[4] = 3,a[5] = 5,a[6] = 8,a[7] = 13,a[8] = 21,a[9] = 34,a[10] = 55,a[11] = 89,a[12] = 144,a[13] = 233,a[14] = 377,a[15] = 610,a[16] = 987,a[17] = 1597,a[18] = 2584,a[19] = 4181,a[20] = 6765,a[21] = 10946,a[22] = 17711,a[23] = 28657,a[24] = 46368,a[25] = 75025,a[26] = 121393,a[27] = 196418,a[28] = 317811,a[29] = 514229,a[30] = 832040,a[31] = 1346269,a[32] = 2178309,a[33] = 3524578,a[34] = 5702887,a[35] = 9227465,a[36] = 14930352,a[37] = 24157817,a[38] = 39088169,a[39] = 63245986,a[40] = 102334155,a[41] = 165580141,a[42] = 267914296,a[43] = 433494437,a[44] = 701408733,a[45] = 1134903170,a[46] = 1836311903,a[47] = 2971215073,a[48] = 4807526976,a[49] = 7778742049,a[50] = 12586269025,a[51] = 20365011074,a[52] = 32951280099,a[53] = 53316291173,a[54] = 86267571272,a[55] = 139583862445,a[56] = 225851433717,a[57] = 365435296162,a[58] = 591286729879,a[59] = 956722026041,a[60] = 1548008755920,a[61] = 2504730781961,a[62] = 4052739537881,a[63] = 6557470319842,a[64] = 10610209857723,a[65] = 17167680177565,a[66] = 27777890035288,a[67] = 44945570212853,a[68] = 72723460248141,a[69] = 117669030460994,a[70] = 190392490709135,a[71] = 308061521170129,a[72] = 498454011879264,a[73] = 806515533049393,a[74] = 1.30496954492866E+15,a[75] = 2.11148507797805E+15,a[76] = 3.41645462290671E+15,a[77] = 5.52793970088476E+15,a[78] = 8.94439432379146E+15,a[79] = 1.44723340246762E+16,a[80] = 2.34167283484677E+16,a[81] = 3.78890623731439E+16,a[82] = 6.13057907216116E+16,a[83] = 9.91948530947555E+16,a[84] = 1.60500643816367E+17,a[85] = 2.59695496911123E+17,a[86] = 4.2019614072749E+17,a[87] = 6.79891637638612E+17,a[88] = 1.1000877783661E+18,a[89] = 1.77997941600471E+18,a[90] = 2.88006719437082E+18,a[91] = 4.66004661037553E+18,a[92] = 7.54011380474635E+18,a[93] = 1.22001604151219E+19,a[94] = 1.97402742198682E+19,a[95] = 3.19404346349901E+19,a[96] = 5.16807088548583E+19,a[97] = 8.36211434898484E+19,a[98] = 1.35301852344707E+20,a[99] = 2.18922995834555E+20,a[100] = 3.54224848179262E+20,