Associated Omega numbers of order 2, triangle T(n,k) read by rows for n >= 0 and 0 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =-2a(6) =1a(7) =5a(8) =-20a(9) =16a(10) =1a(11) =7a(12) =-70a(13) =336a(14) =-272a(15) =1a(16) =9a(17) =-168a(18) =2016a(19) =-9792a(20) =7936a(21) =1a(22) =11a(23) =-330a(24) =7392a(25) =-89760a(26) =436480a(27) =-353792a(28) =1a(29) =13