# A291419 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 24 6 60 7 148 8 376 9 944 10 2392 11 6032 12 15280 13 38608 14 97728 15 247104 16 625312 17 1581568 18 4001680 19 10122624 20 25610368 21 64787520 22 163907904 23 414654848 24 1049031104 25 2653873152 26 6713958912 27 16985280000 28 42970438432 29 108708830336 30 275018076928 31 695755635328 32 1760162851328