-90000

Appears in sequences

• Signed Delannoy triangle convolved with 10^n.at n=16A178870
• a(n) = 1*2*3*4*5*6*7 - 8*9*10*11*12*13*14 + 15*16*17*18*19*20*21 - ... + (up to n).at n=11A319547