# A148100 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 26 6 76 7 239 8 753 9 2540 10 8572 11 30128 12 106501 13 387844 14 1422789 15 5316121 16 20099588 17 76671429 18 296355338 19 1151184226 20 4524804463 21 17853802855 22 71134139857 23 284557313732 24 1146559570375 25 4641910594671 26 18885060480277 27 77240337339152 28 316960064504831 29 1307542974531887 30 5407643110588584