# A203278 (b-file synthesized from sequence entry) 0 1 1 2 2 12 3 44 4 84 5 68 6 14328 7 836 8 24040 9 1231088 10 31063252 11 5495668 12 2474249308 13 4505692 14 130544952 15 2741953536 16 6519198872 17 11977808 18 2197436928400 19 5058240848 20 11783977054420 21 363453226568756 22 135517101268864 23 6345558675936 24 67883449330825012 25 1419845303575428