A114837 Indices of Fibonacci numbers with 8 distinct prime factors.

60, 72, 110, 112, 114, 128, 130, 135, 147, 154, 170, 171, 174, 217, 225, 231, 236, 238, 275, 279, 282, 290, 309, 316, 338, 355, 366, 374, 425, 436, 442, 452, 471, 481, 524, 538, 548, 553, 575, 642, 649, 694, 796, 801, 818, 833, 838, 847, 849, 851, 886, 889, 922, 923, 926, 939, 949, 958, 963, 965, 971, 979, 1037, 1041, 1077, 1079, 1094, 1111, 1127, 1137, 1141, 1153, 1154, 1189, 1211

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..87

Blair Kelly, Fibonacci and Lucas Factorizations.

Example

a(1)=60 because 60th fibonacci number consists of 8 distinct prime factors (i.e. 1548008755920 = 2^4 x 3^2 x 5 x 11 x 31 x 41 x 61 x 2521)

Prog

(PARI) n=1; while(n<370, if(omega(fibonacci(n))==8, print1(n, ", ")); n++)

Crossrefs

Cf. A114823-A114826, A114836-A114841.

Column k=8 of A303217.

Sequence in context: A335935 A347935 A347938 * A328149 A154548 A244384

Adjacent sequences: A114834 A114835 A114836 * A114838 A114839 A114840

Keyword

nonn

Author

Shyam Sunder Gupta, Feb 19 2006

Extensions

More terms from Ryan Propper, Apr 26 2006

a(53)-a(75) from Max Alekseyev, Aug 18 2013

Status

approved