# A103287 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 12 4 30 5 77 6 202 7 540 8 1464 9 4014 10 11101 11 30910 12 86542 13 243416 14 687364 15 1947736 16 5536216 17 15779646 18 45088304 19 129124925 20 370550378 21 1065368994 22 3068348448 23 8851297414 24 25571726480 25 73981434516 26 214317561452