# A009412 (b-file synthesized from sequence entry) 0 0 1 1 2 -1 3 5 4 -12 5 29 6 -165 7 993 8 -7056 9 58617 10 -520065 11 5139485 12 -56499564 13 676947413 14 -8785333557 15 122824831353 16 -1839706861440 17 29397288124913 18 -499197383688033 19 8976479629200565 20 -170396114982640300 21 3405066284386654349