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A328734

Fibonacci numbers F(k) for k in A328733.

1, 2, 3, 21, 34, 610, 196418, 24157817, 39088169, 701408733, 72723460248141, 2427893228399975082453, 781774079430987230203437, 36726740705505779255899443, 150804340016807970735635273952047185, 453973694165307953197296969697410619233826

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

Blair Kelly, Fibonacci factorizations up to 1000 terms

EXAMPLE

The Fibonacci numbers (A000045) start 0,1,1,2,3,5,8,13,21,..., so the first 1 is a term here, but the second 1 is not. (Note that 0 has infinitely many prime divisors.)

21 = 3 * 7 and 34 = 2 * 17 both have two prime factors, and because they are contiguous in the Fibonacci sequence, 21 is included.

CROSSREFS

Cf. A000045, A038575, A328733 (indices).

Sequence in context: A282340 A248953 A090122 * A296254 A114749 A141458

Adjacent sequences: A328731 A328732 A328733 * A328735 A328736 A328737

KEYWORD

nonn

AUTHOR

Tomás Roca Sánchez, Oct 26 2019

EXTENSIONS

Edited to avoid confusion caused by the pair of 1's in the Fibonacci sequence. - N. J. A. Sloane, Nov 11 2019

STATUS

approved