A083407 Odd squares which can be expressed as the product of a number and its reversal in at least two different ways.

1239016098321, 1503617940841, 1842890415961, 11151144884889, 12909311260209, 149920947896841, 181937770841761, 12128839583882121, 12598313930168521, 12639203218972521, 13081277143774921, 14462953695004441, 14999934809556841, 15260975534573041

Offset

1,1

References

S. S. Gupta, EPRNs, Science Today, Feb. 1987, India.

Links

Chai Wah Wu, Table of n, a(n) for n = 1..126

Shyam Sunder Gupta, EPRN Numbers.

Example

1239016098321 = 1113111 * 1113111 = 1022121 * 1212201, etc.

Crossrefs

Cf. A066531, A083406 (even squares version), A083408 (all squares version).

Sequence in context: A060088 A359346 A077300 * A287262 A260250 A088280

Adjacent sequences: A083404 A083405 A083406 * A083408 A083409 A083410

Keyword

nonn,base

Author

Shyam Sunder Gupta, Jun 07 2003

Extensions

Corrected by Hans Havermann, Feb 13 2012

a(4)-a(14) (including four found by Hans Havermann) from Donovan Johnson, Feb 18 2012

Definition corrected by N. J. A. Sloane, Aug 01 2019

Status

approved