# A281588 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 4 5 -5 6 -24 7 -98 8 -272 9 621 10 4960 11 31856 12 132672 13 -437593 14 -4893056 15 -42854160 16 -237969664 17 1026405753 18 14756156928 19 163699919104 20 1136284574720 21 -6054175060941 22 -106379840985088 23 -1428593836836352 24 -11899498670002176 25 75477454065058725