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A114825
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Indices of Fibonacci numbers with 11 distinct prime factors.
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3
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140, 144, 150, 160, 162, 190, 204, 208, 230, 234, 261, 285, 306, 310, 345, 351, 354, 372, 387, 388, 399, 438, 459, 469, 470, 475, 483, 485, 488, 507, 508, 518, 531, 549, 568, 596, 598, 632, 656, 671, 686, 688, 715, 788, 806, 808, 822, 834, 844, 872, 873, 874, 902, 925, 1005, 1048, 1052, 1058, 1073, 1076, 1083, 1101, 1113, 1124, 1131, 1146, 1158, 1162, 1166, 1173, 1195, 1205, 1221
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1)=140 because the 140th Fibonacci number (i.e., 81055900096023504197206408605) consists of 11 distinct prime factors (i.e., 3 * 5 * 11 * 13 * 29 * 41 * 71 * 281 * 911 * 141961 * 12317523121).
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PROG
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(PARI) n=1; while(n<315, if(omega(fibonacci(n))==11, print1(n, ", ")); n++)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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