# A120672 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 12 4 22 5 60 6 104 7 252 8 438 9 1020 10 1792 11 4092 12 7264 13 16380 14 29332 15 65532 16 118198 17 262140 18 475664 19 1048572 20 1912392 21 4194300 22 7683172 23 16777212 24 30850272 25 67108860 26 123817124 27 268435452 28 496754308 29 1073741820 30 1992366124 31 4294967292 32 7988854198