# A134457 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 6 4 8 5 4 6 18 7 38 8 48 9 40 10 16 11 80 12 210 13 402 14 644 15 852 16 928 17 912 18 704 19 256 20 1344 21 3944 22 9276 23 19448 24 37090 25 65602 26 107388 27 160760 28 220200