Triangle, read by rows, where T(n,k) = A008275(k+1,n-k+1) are Stirling numbers of the first kind.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =0a(4) =-3a(5) =1a(6) =0a(7) =2a(8) =-6a(9) =1a(10) =0a(11) =0a(12) =11a(13) =-10a(14) =1a(15) =0a(16) =0a(17) =-6a(18) =35a(19) =-15a(20) =1a(21) =0a(22) =0a(23) =0a(24) =-50a(25) =85a(26) =-21a(27) =1a(28) =0a(29) =0