# A148147 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 11 5 29 6 94 7 286 8 979 9 3248 10 11681 11 40909 12 152740 13 556090 14 2129094 15 7997403 16 31212056 17 119998066 18 476046850 19 1863806284 20 7493408222 21 29788758672 22 121056229310 23 487416498090 24 1999078630202 25 8134473990239 26 33632444233016 27 138095708826158 28 574927241905816 29 2379378652444523