A099148 Take a <= b such that f(a)+f(b)=concatenation of a and b, where f(k)=k(k+3)/2 (A000096). Sequence gives values of a.

2, 3, 8, 9, 14, 15, 20, 39, 77, 98, 99, 138, 158, 164, 177, 200, 399, 492, 614, 998, 999, 1065, 1383, 1505, 1598, 1797, 1859, 1920, 2000, 2655, 3077, 3213, 3762, 3999, 6707

Offset: 1

Author

John W. Layman, Sep 30 2004

Keywords

• nonn
• base

Comments

For values of b, see A099149.

Crossrefs

Cf. A096032, A099149.

Extensions

Edited by Charles R Greathouse IV, Apr 23 2010