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A104312
Prime coefficient of x^n in (x^3+x^2+x+1)^n for n in A104311.
2
3, 31, 101, 3823, 2266366724843687556556015073508073201681
OFFSET
1,1
COMMENTS
a(6), which corresponds to n=649, is too large to include.
MATHEMATICA
f=1; Do[f=Expand[f*(x^3+x^2+x+1)]; s=Coefficient[f, x, n]; If[PrimeQ[s], Print[{n, s}]], {n, 1000}]
CROSSREFS
Cf. A005725 (quadrinomial coefficients), A104314 (nontrivial prime pentanomial coefficients).
Sequence in context: A294973 A307711 A077547 * A326736 A107197 A096060
KEYWORD
nonn
AUTHOR
T. D. Noe, Mar 01 2005
STATUS
approved