# A012708 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 0 4 -12 5 60 6 -570 7 3780 8 -29568 9 169344 10 -557160 11 -13049520 12 375064008 13 -7823848032 14 135678667488 15 -2221166656800 16 32120158935552 17 -397914002426496 18 2522488580207424 19 61215640433391744