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

Author

Lekraj Beedassy, Apr 23 2006

Keywords

• nonn
• base

Comments

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

Examples

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

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..4679 (n = 1..54 from Hans Havermann)
• Shyam Sunder Gupta, EPRNs

Crossrefs

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

Extensions

Edited and corrected by Klaus Brockhaus, Aug 21 2007

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