# A148302 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 13 5 38 6 113 7 365 8 1191 9 4067 10 14144 11 50226 12 182525 13 669319 14 2506400 15 9447969 16 36149151 17 139432800 18 542694872 19 2132023358 20 8422627133 21 33567994566 22 134391139541 23 541815720672 24 2194797616118 25 8935440795783 26 36560925539999 27 150149210854266 28 619576859264739 29 2564765323038883