# A108124 (b-file synthesized from sequence entry) 0 0 1 1 2 -2 3 6 4 -20 5 80 6 -366 7 1904 8 -11080 9 71424 10 -505210 11 3891712 12 -32433180 13 290787328 14 -2791053734 15 28556359680 16 -310264194320 17 3567710830592 18 -43287834157938 19 552688817143808 20 -7407423764750500 21 103981459115606016 22 -1525675236649033822 23 23354749389657604096