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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.
3
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
1,1
COMMENTS
For values of b, see A099149.
CROSSREFS
Sequence in context: A327312 A047243 A277094 * A309423 A029787 A246396
KEYWORD
nonn,base
AUTHOR
John W. Layman, Sep 30 2004
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 23 2010
STATUS
approved