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A152799
Column 2 of triangle A152798; first differences of A122889.
3
1, 1, 3, 6, 15, 40, 113, 348, 1148, 4045, 15203, 60710, 256688, 1145887, 5386283, 26590338, 137537012, 743766652, 4196681423, 24661702224, 150676068558, 955611495432, 6281965526173, 42745748797360, 300690981532778
OFFSET
0,3
CROSSREFS
Sequence in context: A086326 A098701 A218777 * A140824 A001433 A005368
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 23 2008
STATUS
approved