Irregular triangle T(n, k) = ((-1)^(k+1)/2)*Sum_{j=0..n-2*k} binomial(n+2, j)*binomial(n+2, j+k+1)* binomial(n+2, j+2*k+2), read by rows.

A158193

Irregular triangle T(n, k) = ((-1)^(k+1)/2)*Sum_{j=0..n-2*k} binomial(n+2, j)*binomial(n+2, j+k+1)* binomial(n+2, j+2*k+2), read by rows.

Terms

    a(0) =-1a(1) =-9a(2) =-72a(3) =3a(4) =-550a(5) =50a(6) =-4140a(7) =585a(8) =-10a(9) =-31017a(10) =5880a(11) =-245a(12) =-232288a(13) =54488a(14) =-3808a(15) =35a(16) =-1742148a(17) =480816a(18) =-47880a(19) =1134a(20) =-13095450a(21) =4110750a(22) =-532350a(23) =22050a(24) =-126a(25) =-98687600a(26) =34397880a(27) =-5466780a(28) =333960a(29) =-5082

External references