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A023667
Convolution of A001950 with itself.
0
4, 20, 53, 110, 201, 330, 504, 730, 1013, 1364, 1787, 2288, 2880, 3564, 4348, 5240, 6243, 7370, 8624, 10010, 11540, 13214, 15045, 17038, 19196, 21536, 24056, 26764, 29671, 32776, 36095, 39630, 43384, 47378, 51605, 56076, 60801
OFFSET
1,1
CROSSREFS
Sequence in context: A244050 A250224 A250272 * A213485 A366151 A296274
KEYWORD
nonn
STATUS
approved