# A050494 (b-file synthesized from sequence entry) 0 1 1 10 2 52 3 192 4 570 5 1452 6 3300 7 6864 8 13299 9 24310 10 42328 11 70720 12 114036 13 178296 14 271320 15 403104 16 586245 17 836418 18 1172908 19 1619200 20 2203630 21 2960100 22 3928860 23 5157360 24 6701175 25 8625006 26 11003760 27 13923712 28 17483752 29 21796720 30 26990832 31 33211200 32 40621449