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A114821
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Indices of Fibonacci numbers with 12 prime factors when counted with multiplicity.
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0
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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
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..43.
Blair Kelly, Fibonacci and Lucas Factorizations.
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EXAMPLE
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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)
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PROG
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(PARI) n=1; while(n<320, if(bigomega(fibonacci(n))==12, print1(n, ", ")); n++)
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CROSSREFS
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Sequence in context: A121377 A067191 A080854 * A108098 A114505 A186400
Adjacent sequences: A114818 A114819 A114820 * A114822 A114823 A114824
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KEYWORD
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hard,more,nonn
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 19 2006
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), May 24 2006
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STATUS
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approved
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