A075057 a(1) = 0, then smallest triangular number such that a(n+1)- a(n) is a palindrome.

0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 78, 300, 946, 990, 1596, 2080, 2211, 3160, 3321, 3916, 13695, 14028, 17020, 34191, 34453, 38226, 38781, 82215, 83436, 87990, 102831, 103285, 156520, 208335, 208981, 283128, 291466, 382375, 442270, 508536

Offset

1,3

Links

Sean A. Irvine, Table of n, a(n) for n = 1..150

Example

78 follows 45 as 78-45 = 33.

Crossrefs

Sequence in context: A361751 A089717 A050760 * A069792 A194153 A025737

Adjacent sequences: A075054 A075055 A075056 * A075058 A075059 A075060

Keyword

base,nonn,changed

Author

Amarnath Murthy, Sep 07 2002

Extensions

More terms from Jason Earls, Sep 09 2002

Offset corrected by Sean A. Irvine, Feb 07 2025

Status

approved