# A172050 (b-file synthesized from sequence entry) 0 0 1 4 2 8 3 13 4 20 5 30 6 46 7 72 8 116 9 191 10 320 11 542 12 924 13 1580 14 2704 15 4625 16 7900 17 13470 18 22922 19 38928 20 65980 21 111619 22 188488 23 317758 24 534840 25 898900 26 1508696 27 2528917 28 4233956 29 7080606 30 11828710 31 19741272 32 32916164 33 54835655 34 91276304