A155819 - OEIS

A155819

a(n) = p(n+1)^2 + 2*p(n) + 1; p(n) is the n-th prime number and n >= 1.

14, 32, 60, 136, 192, 316, 396, 568, 888, 1020, 1432, 1756, 1932, 2296, 2904, 3588, 3840, 4612, 5176, 5472, 6388, 7048, 8088, 9588, 10396, 10812, 11656, 12096, 12988, 16356, 17416, 19032, 19596, 22480, 23100, 24952, 26884, 28216, 30264

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OFFSET

1,1

COMMENTS

All the terms are even.

LINKS

Table of n, a(n) for n=1..39.

MATHEMATICA

#[[2]]^2+2#[[1]]+1&/@Partition[Prime[Range[40]], 2, 1] (* Harvey P. Dale, Jan 29 2021 *)

PROG

(PARI) a(n)=prime(n+1)^2+2*prime(n) + 1; \\ Joerg Arndt, Aug 07 2013

CROSSREFS

Sequence in context: A084194 A031109 A375310 * A120711 A018959 A225420

Adjacent sequences: A155816 A155817 A155818 * A155820 A155821 A155822

KEYWORD

nonn,less

AUTHOR

Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 28 2009

STATUS

approved