# A108538 (b-file synthesized from sequence entry) 0 1 1 64 2 731 3 4553 4 20155 5 71272 6 214653 7 572743 8 1389702 9 3122752 10 6585183 11 13162741 12 25131718 13 46115029 14 81722067 15 140429357 16 234772177 17 382932581 18 610826859 19 954815625 20 1465182669 21 2210554686 22 3283463257 23 4807283267 24 6944818576 25 9908846494 26 13974977743 27 19497238421 28 26926835328