A117281 Palindromes whose squares belong to A066531.

252, 2772, 20502, 23632, 25452, 26962, 27972, 48384, 225522, 252252, 259952, 279972, 619916, 1113111, 1226221, 1357531, 2005002, 2070702, 2126212, 2150512, 2216122, 2226222, 2249422, 2275722, 2316132, 2347432, 2386832, 2429242

Offset

1,1

Comments

a(n)^2 = A083408(k) for some k.

Links

Chai Wah Wu, Table of n, a(n) for n = 1..4679 (n = 1..54 from Hans Havermann)

Shyam Sunder Gupta, EPRNs

Example

27972 is in the sequence because 782432784 = 27972*27972 = 15984*48951.
1113111 is in the sequence because 1239016098321 = 1113111*1113111 = 1022121*1212201.

Crossrefs

Cf. A066531, A083408 (square EPRNs), A206642.

Sequence in context: A154073 A166783 A104679 * A152466 A004535 A027815

Adjacent sequences: A117278 A117279 A117280 * A117282 A117283 A117284

Keyword

nonn,base

Author

Lekraj Beedassy, Apr 23 2006

Extensions

Edited and corrected by Klaus Brockhaus, Aug 21 2007

Edited by N. J. A. Sloane, Aug 01 2019

Status

approved