A023667 Convolution of A001950 with itself.

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

Author

Clark Kimberling

Keywords

• nonn