A217875 Primes which have the same (base 10) digital sum A007953 as the next smaller and next larger prime.

22229, 25391, 69557, 107563, 111409, 167953, 200843, 202309, 208609, 217271, 221891, 236609, 238591, 250091, 250343, 274609, 290557, 355591, 373091, 382391, 404291, 407119, 415409, 417419, 439063, 441229, 447943, 515191, 542873, 581891, 582119, 591691, 614963

Offset

1,1

Links

M. F. Hasler, Table of n, a(n) for n = 1..733 (all terms below 10^7).

C. Caldwell (Ed.), 22229 (another Prime Pages' Curiosity).

Prog

(PARI) {q=r=0; forprime(p=1, default(primelimit), (p-q)%18==0 & (q-r)%18==0 & A007953(p)==A007953(q) & A007953(p)==A007953(r) & print1(q", "); r=q; q=p)}

Crossrefs

A subsequence of A066540.

Sequence in context: A209396 A210295 A060109 * A253737 A185608 A204148

Adjacent sequences: A217872 A217873 A217874 * A217876 A217877 A217878

Keyword

nonn,base

Author

M. F. Hasler, Oct 13 2012

Status

approved