# A149092 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 8 4 31 5 87 6 323 7 1081 8 3973 9 14445 10 54212 11 204544 12 786923 13 3038695 14 11904138 15 46856916 16 185950943 17 742818757 18 2981832628 19 12038056472 20 48820715319 21 198765075087 22 812772546171 23 3334144388475 24 13723690769043 25 56666703823593 26 234592663532672 27 973902799859392 28 4052797675504189