Triangle read by rows: T(n,k) = (-1)^k * n! * 2^(n-2*k) * binomial(n,k) * binomial(2*k,k) (0<=k<=n).

A123516

Triangle read by rows: T(n,k) = (-1)^k * n! * 2^(n-2*k) * binomial(n,k) * binomial(2*k,k) (0<=k<=n).

Terms

    a(0) =1a(1) =2a(2) =-1a(3) =8a(4) =-8a(5) =3a(6) =48a(7) =-72a(8) =54a(9) =-15a(10) =384a(11) =-768a(12) =864a(13) =-480a(14) =105a(15) =3840a(16) =-9600a(17) =14400a(18) =-12000a(19) =5250a(20) =-945a(21) =46080a(22) =-138240a(23) =259200a(24) =-288000a(25) =189000a(26) =-68040a(27) =10395a(28) =645120a(29) =-2257920

External references