# A027455 (b-file synthesized from sequence entry)
2 15
3 65
4 175
5 9963
6 5368
7 1105000
8 5720625
9 105686875
10 75492928
11 74269960128
12 56445795000
13 96454009575000
14 76498373160000
15 61692439558464
16 403805999193597
17 1643804692663258125
18 1377243480733120000