# A019245 (b-file synthesized from sequence entry) 3 0 4 0 5 4 6 6 7 4 8 16 9 60 10 88 11 224 12 650 13 1480 14 3372 15 9208 16 23126 17 56988 18 147778 19 387084 20 998552 21 2604672 22 6890844 23 18189156 24 48123802 25 128110692 26 341753792 27 912635960 28 2443846624 29 6557775236 30 17619900692 31 47420051376