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A114821 Indices of Fibonacci numbers with 12 prime factors when counted with multiplicity. 1
48, 60, 90, 126, 176, 258, 297, 315, 375, 385, 410, 430, 441, 459, 474, 475, 496, 555, 609, 621, 627, 638, 682, 710, 711, 729, 734, 759, 805, 814, 826, 854, 875, 897, 903, 906, 908, 925, 932, 935, 981, 987, 994, 1022, 1067, 1089, 1105, 1244, 1246, 1251, 1265, 1285, 1341, 1348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

Blair Kelly, Fibonacci and Lucas Factorizations.

EXAMPLE

a(1)=48 because 48th fibonacci number(i.e. 4807526976) consists of 12 prime factors (i.e. 2*2*2*2*2*2*3*3*7*23*47*1103)

PROG

(PARI) n=1; while(n<320, if(bigomega(fibonacci(n))==12, print1(n, ", ")); n++)

CROSSREFS

Column k=12 of A303215.

Sequence in context: A261546 A335938 A335216 * A108098 A114505 A323610

Adjacent sequences:  A114818 A114819 A114820 * A114822 A114823 A114824

KEYWORD

hard,nonn

AUTHOR

Shyam Sunder Gupta, Feb 19 2006

EXTENSIONS

More terms from Ryan Propper, May 24 2006

More terms from Amiram Eldar, Oct 14 2019

STATUS

approved

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Last modified July 15 00:36 EDT 2020. Contains 335762 sequences. (Running on oeis4.)