# A012320 (b-file synthesized from sequence entry) 0 1 1 0 2 -1 3 -6 4 -27 5 -100 6 -285 7 70 8 10857 9 138456 10 1345575 11 12246322 12 104657421 13 905107892 14 7506129995 15 67825026750 16 599458508113 17 7155160301616 18 87359515770831 19 1675741434252522 20 28468606356977333