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A104314 Prime coefficient of x^(2n) in (x^4+x^3+x^2+x+1)^n for n in A104313. 2
5, 19, 1974442362935339179, 47705925773278538281, 234692178470218983001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

MATHEMATICA

f=1; Do[f=Expand[f*(x^4+x^3+x^2+x+1)]; s=Coefficient[f, x, 2n]; If[PrimeQ[s], Print[{n, s}]], {n, 100}]

CROSSREFS

Cf. A005191 (pentanomial coefficients), A104312 (nontrivial prime quadrinomial coefficients).

Sequence in context: A278562 A013531 A122152 * A302662 A261545 A093482

Adjacent sequences:  A104311 A104312 A104313 * A104315 A104316 A104317

KEYWORD

more,nonn

AUTHOR

T. D. Noe, Mar 01 2005

STATUS

approved

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Last modified September 19 04:39 EDT 2019. Contains 327187 sequences. (Running on oeis4.)