# A294798 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 21 5 73 6 238 7 721 8 2044 9 5492 10 14178 11 35610 12 87938 13 215295 14 525787 15 1286294 16 3160692 17 7812235 18 19435271 19 48669058 20 122640467 21 310825886 22 791852703 23 2026485203 24 5206520173 25 13421671869 26 34697109772 27 89909564367 28 233436502611 29 607059621989 30 1580760867164 31 4120657531699