# A129580 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 35 4 167 5 862 6 4779 7 28287 8 177833 9 1182141 10 8276861 11 60830800 12 467892036 13 3756528046 14 31407155606 15 272873483535 16 2459042838030 17 22945764798093 18 221359390289706 19 2204643455978731 20 22639204005810330 21 239413600552185394