# A294431 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 8 4 19 5 57 6 209 7 884 8 4148 9 21156 10 115985 11 678581 12 4213609 13 27644450 14 190899336 15 1382958560 16 10480142163 17 82864869821 18 682076806177 19 5832742205076 20 51724158235392 21 474869816156772 22 4506715738447345 23 44152005855084369 24 445958869294805313 25 4638590332229999378