A068126 Smallest triangular numbers with possible initial (least significant) digits.

10, 1, 3, 15, 6, 28, 10, 1711, 15, 2016, 120, 21, 325, 1326, 28, 630, 231, 435, 36, 1540, 741, 45, 946, 2850, 351, 153, 55, 2556, 3160, 561, 465, 66, 1770, 171, 1275, 276, 78, 780, 1081, 1485, 3486, 190, 91, 595, 496, 20100, 112101, 105, 26106, 16110, 105111

Offset

0,1

Links

Table of n, a(n) for n=0..50.

Example

11 is a term as 1711 is a triangular number. 13 is not as no triangular number is of the form 100k + 13.

Crossrefs

Cf. A068125.

Sequence in context: A010181 A111525 A138261 * A156225 A284327 A322219

Adjacent sequences: A068123 A068124 A068125 * A068127 A068128 A068129

Keyword

base,easy,nonn

Author

Amarnath Murthy, Feb 21 2002

Extensions

More terms from Sascha Kurz, Apr 03 2002

Status

approved