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A156027 Greater of Twin Primes of the form : p2(n)=n^1+n^2+n^3+n^4-1. 0
5, 31, 22621, 837931, 3835261, 6377551, 16007041, 30397351, 147753211, 745720141, 987082981, 2439903211, 3276517921, 4178766091, 11468884081, 58714318141, 72695416561, 418374010741, 788251653691, 829180295191 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

2+2^2=2^3+2^4-1=29;2+2^2=2^3+2^4+1=31, ... corresponding n : 1,2,12,30,44,50,63,74,110,165,177,222,239,254,327,492,519,804,942,954,...

LINKS

Table of n, a(n) for n=1..20.

MATHEMATICA

lst={}; Do[p=(n^1+n^2+n^3+n^4); If[PrimeQ[p1=p-1]&&PrimeQ[p2=p+1], AppendTo[lst, p2]], {n, 8!}]; lst

CROSSREFS

Cf. A125964, A156018, A156021, A156026

Sequence in context: A244622 A278574 A062631 * A100840 A265159 A247549

Adjacent sequences:  A156024 A156025 A156026 * A156028 A156029 A156030

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Feb 01 2009

STATUS

approved

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Last modified October 23 03:21 EDT 2019. Contains 328335 sequences. (Running on oeis4.)