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A023663
Convolution of A000201 with itself.
0
1, 6, 17, 36, 68, 114, 176, 258, 360, 488, 643, 826, 1045, 1298, 1588, 1920, 2292, 2712, 3180, 3696, 4269, 4894, 5579, 6326, 7133, 8012, 8958, 9974, 11068, 12234, 13483, 14814, 16225, 17732, 19325, 21010, 22794, 24670, 26652, 28736, 30921
OFFSET
1,2
CROSSREFS
Sequence in context: A307502 A084990 A024181 * A048208 A212980 A132127
KEYWORD
nonn
STATUS
approved