# A017595 (b-file synthesized from sequence entry) 0 216 1 5832 2 27000 3 74088 4 157464 5 287496 6 474552 7 729000 8 1061208 9 1481544 10 2000376 11 2628072 12 3375000 13 4251528 14 5268024 15 6434856 16 7762392 17 9261000 18 10941048 19 12812904 20 14886936 21 17173512 22 19683000