# A019160 (b-file synthesized from sequence entry) 3 0 4 0 5 4 6 6 7 8 8 24 9 55 10 122 11 284 12 640 13 1499 14 3523 15 8555 16 21207 17 52142 18 131769 19 340170 20 873080 21 2262490 22 5947043 23 15649920 24 41289048 25 109539183 26 291179345 27 774884877 28 2066087278 29 5516257587 30 14741851755 31 39438287815