# A059221 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 8 5 18 6 43 7 103 8 255 9 642 10 1640 11 4242 12 11096 13 29278 14 77882 15 208589 16 562056 17 1522606 18 4144521 19 11329608 20 31090910 21 85618848 22 236530942 23 655344579 24 1820585313 25 5070138554 26 14151907583 27 39584395796 28 110938500821 29 311481097178