A068804 Triangular numbers whose digits can be rearranged to form a substring of 123456789012345678901234....
0, 1, 3, 6, 10, 21, 45, 78, 120, 190, 210, 231, 435, 465, 9180, 9870, 12403, 24310, 24531, 47586, 109278, 231540, 235641, 246753, 327645, 541320, 542361, 921403, 1053426, 1345620, 1360425, 1390278, 1405326, 1624503, 1679028, 2098176, 2465310, 2467531, 3049215, 3078921
Offset: 1
Examples
9180 is a term whose digits can be arranged as 8901. 47586 is a term as its digits can be arranged as 45678.
Links
- Andrew Howroyd, Table of n, a(n) for n = 1..10000
Extensions
More terms from Christopher Lund (clund(AT)san.rr.com), Apr 14 2002
Offset changed and a(32) onwards from Andrew Howroyd, Sep 19 2024