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A201709 Primes of the form 10n^2 + 1. 1
11, 41, 251, 491, 641, 811, 2251, 4001, 6761, 7841, 9001, 10891, 12251, 13691, 16001, 16811, 22091, 23041, 32491, 33641, 40961, 50411, 68891, 72251, 73961, 81001, 82811, 86491, 98011, 108161, 110251, 112361, 121001, 125441, 127691 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

MATHEMATICA

Select[Table[10n^2+1, {n, 0, 800}], PrimeQ]

PROG

(MAGMA) [a: n in [0..300] | IsPrime(a) where a is 10*n^2+1];

CROSSREFS

Sequence in context: A260270 A118572 A333084 * A092445 A068840 A082424

Adjacent sequences:  A201706 A201707 A201708 * A201710 A201711 A201712

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 04 2011

STATUS

approved

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Last modified July 26 20:17 EDT 2021. Contains 346294 sequences. (Running on oeis4.)