A069673 Nonpalindromic triangular numbers whose digit reversal is also a triangular number (possibly with fewer digits).

10, 120, 153, 190, 300, 351, 630, 820, 17578, 87571, 156520, 180300, 185745, 547581, 557040, 678030, 1461195, 1851850, 5911641, 6056940, 12145056, 12517506, 16678200, 56440000, 60571521, 65054121, 157433640, 188267310, 304119453, 354911403, 1261250200

Offset

1,1

Links

Giovanni Resta, Table of n, a(n) for n = 1..123 (terms < 2*10^24)

Crossrefs

See A066528 for a different version.

Cf. A066703, A179889.

Cf. A003098, A061455, A066569.

Sequence in context: A289215 A223010 A030022 * A069498 A226767 A307620

Adjacent sequences: A069670 A069671 A069672 * A069674 A069675 A069676

Keyword

nonn,base

Author

Amarnath Murthy, Apr 06 2002

Extensions

More terms from Jason Earls, Jun 07 2002

a(27)-a(31) from Giovanni Resta, Jun 20 2015

Status

approved