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A292851 Fibonacci numbers that are also generalized octagonal numbers. 1
0, 1, 5, 8, 21, 4181 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Intersection of A000045 and A001082.

These are all the terms, as confirmed by Tengely (2009).

All (generalized) g-gonal numbers in Lucas sequences up to g=20 have been determined, see Tengely (2009).

LINKS

Table of n, a(n) for n=0..5.

Szabolcs Tengely, Finding g-gonal numbers in recurrence sequences, Fibonacci Quarterly, vol.46/47, no.3, pp.235-240, (2009).

CROSSREFS

Cf. A000045, A001082.

Cf. A039595 (triangular Fibonacci numbers).

Sequence in context: A036381 A277369 A140419 * A138023 A120037 A120038

Adjacent sequences:  A292848 A292849 A292850 * A292852 A292853 A292854

KEYWORD

nonn,easy,fini,full

AUTHOR

Tomohiro Yamada, Sep 25 2017

STATUS

approved

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Last modified April 5 23:13 EDT 2020. Contains 333260 sequences. (Running on oeis4.)