A068126 Smallest triangular number whose final digits are A068125(n).
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: 1
Examples
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.
Extensions
More terms from Sascha Kurz, Apr 03 2002
Offset changed by Andrew Howroyd, Sep 21 2024