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A114839 Indices of Fibonacci numbers with 6 distinct prime factors. 2
40, 48, 54, 56, 64, 78, 92, 95, 99, 102, 116, 117, 129, 133, 155, 159, 175, 177, 188, 194, 205, 206, 219, 237, 245, 265, 278, 314, 323, 327, 339, 341, 343, 346, 356, 358, 361, 362, 394, 407, 411, 417, 422, 427, 437, 446, 454, 466, 482, 502, 503, 505, 514, 515, 527, 535, 542, 545, 551, 562, 573, 577, 583, 593, 607, 614, 622, 623, 625, 634, 655, 662, 667, 674, 713, 727, 731, 769, 781, 789, 791, 803, 809, 821, 835, 893, 917, 919, 974, 977, 982, 993, 995, 1013, 1039, 1047, 1057, 1081, 1097, 1103, 1121, 1138, 1151, 1165, 1172, 1202, 1203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n such that A000045(n) is in A046306.

LINKS

Table of n, a(n) for n=1..107.

Blair Kelly, Fibonacci and Lucas Factorizations.

EXAMPLE

a(1)=40 because 40th fibonacci number consists of 6 distinct prime factors (i.e. 102334155 = 3 x 5 x 7 x 11 x 41 x 2161)

a(31) = 341 because F(341)= 89 * 557 * 2417 * 761227665342913 * 197907695243868721 * 4558282384863830955384586674337 has exactly 6 prime factors.

PROG

(PARI) n=1; while(n<330, if(omega(fibonacci(n))==6, print1(n, ", ")); n++)

CROSSREFS

Cf. A114823-A114826, A114836-A114841.

Column k=6 of A303217.

Sequence in context: A046796 A204746 A197734 * A179435 A120382 A290017

Adjacent sequences:  A114836 A114837 A114838 * A114840 A114841 A114842

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, Feb 19 2006

EXTENSIONS

More terms from Jonathan Vos Post, Mar 22 2006

Corrected by Ryan Propper, Apr 26 2006

a(55)-a(107) from Max Alekseyev, Aug 18 2013

STATUS

approved

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Last modified May 24 17:16 EDT 2019. Contains 323533 sequences. (Running on oeis4.)