# A012412 (b-file synthesized from sequence entry) 0 1 1 0 2 -1 3 -6 4 -15 5 20 6 255 7 70 8 -3423 9 46728 10 501375 11 -3625358 12 -60112239 13 420430556 14 9211149311 15 -79037179650 16 -2033765765567 17 18361020368016 18 572833991092479 19 -5418169914165654 20 -201869115241158607