# A059413 (b-file synthesized from sequence entry) 1 2 2 6 3 18 4 48 5 126 6 306 7 738 8 1716 9 3936 10 8862 11 19770 12 43560 13 95310 14 206874 15 446478 16 958236 17 2047542 18 4356660 19 9237606 20 19522752 21 41142522 22 86477298 23 181343202 24 379459284 25 792472968 26 1652046606 27 3438310428 28 7145039916 29 14826950742