Infinite square array read by antidiagonals: Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)*Q(m+1, 2k-1) - (2k-1)*Q(m+2,2k-2), m*Q(m, 2k+1) = (m - 2k)*Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1).

A127080

Infinite square array read by antidiagonals: Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)*Q(m+1, 2k-1) - (2k-1)*Q(m+2,2k-2), m*Q(m, 2k+1) = (m - 2k)*Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =-2a(6) =1a(7) =1a(8) =-1a(9) =-5a(10) =1a(11) =1a(12) =0a(13) =-4a(14) =12a(15) =1a(16) =1a(17) =1a(18) =-3a(19) =3a(20) =43a(21) =1a(22) =1a(23) =2a(24) =-2a(25) =-4a(26) =28a(27) =-120a(28) =1a(29) =1

External references