25 Jun
2019
25 Jun
'19
3:15 p.m.
BK: "Out[128]= { 0, 1, -2, -4, -20, -132, -1008, -8432, -75096, -700180, -6761040 } But this sequence isn't even in the OEIS ! Why not ?" http://oeis.org/A324311