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

0,3

Links

Table of n, a(n) for n=0..39.

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

Author

Amarnath Murthy, Sep 07 2002

Extensions

More terms from Jason Earls, Sep 09 2002

Status

approved