A262344 Centered 11-gonal (or hendecagonal) primes.

67, 397, 727, 859, 1321, 2311, 3037, 3301, 4159, 8581, 10891, 12409, 19471, 28909, 47059, 51217, 63559, 64747, 78541, 79861, 95107, 100981, 108571, 119659, 134707, 139921, 156157, 177211, 195427, 203809, 221101, 257797, 264991, 284659, 287167, 294757, 307627, 315481

Offset

1,1

Comments

Primes of the form (11*k^2 - 11*k + 2)/2.

Links

Table of n, a(n) for n=1..38.

OEIS Wiki, Figurate numbers

Eric Weisstein's World of Mathematics, Centered Polygonal Number

Eric Weisstein's World of Mathematics, Prime Number

Maple

select(isprime, [(11*k^2-11*k+2)/2$k=1..300])[];  # Alois P. Heinz, May 27 2022

Prog

(PARI) for(n=1, 1e3, if(isprime(k=(11*n^2-11*n+2)/2), print1(k, ", "))) \\ Altug Alkan, Nov 26 2015

Crossrefs

Intersection of A069125 and A000040.

Sequence in context: A026911 A142371 A142609 * A323577 A142735 A342803

Adjacent sequences: A262341 A262342 A262343 * A262345 A262346 A262347

Keyword

nonn,changed

Author

Ilya Gutkovskiy, Nov 26 2015

Extensions

a(15)=47059 inserted by Georg Fischer, May 27 2022

Status

approved