A074367 (p^2-5)/4 for odd primes p.

1, 5, 11, 29, 41, 71, 89, 131, 209, 239, 341, 419, 461, 551, 701, 869, 929, 1121, 1259, 1331, 1559, 1721, 1979, 2351, 2549, 2651, 2861, 2969, 3191, 4031, 4289, 4691, 4829, 5549, 5699, 6161, 6641, 6971, 7481, 8009, 8189, 9119, 9311, 9701, 9899, 11129

Offset

1,2

Links

Table of n, a(n) for n=1..46.

Mathematica

a[n_] := (Prime[n+1]^2-5)/4
(#^2-5)/4&/@Prime[Range[2, 50]] (* Harvey P. Dale, Jan 15 2019 *)

Crossrefs

a(n) = A024701(n)-1.

Sequence in context: A242383 A141785 A144311 * A088486 A174917 A214451

Adjacent sequences: A074364 A074365 A074366 * A074368 A074369 A074370

Keyword

nonn,easy

Author

Roger L. Bagula, Sep 23 2002

Extensions

Edited by Dean Hickerson, Oct 09 2002

Status

approved