# A046126 (b-file synthesized from sequence entry) 0 1 1 3 2 -3 3 -15 4 45 5 315 6 -1575 7 -14175 8 99225 9 1091475 10 -9823275 11 -127702575 12 1404728325 13 21070924875 14 -273922023375 15 -4656674397375 16 69850115960625 17 1327152203251875 18 -22561587455281875 19 -473793336560919375