Triangle T(n, k) = ( (k+2)/(2*binomial(k+2, 2)^2) )*binomial(n, k)^2*binomial(n+1, k)*binomial(n+2, k), read by rows.
A142470
Triangle T(n, k) = ( (k+2)/(2*binomial(k+2, 2)^2) )*binomial(n, k)^2*binomial(n+1, k)*binomial(n+2, k), read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =1a(6) =1a(7) =30a(8) =30a(9) =1a(10) =1a(11) =80a(12) =300a(13) =80a(14) =1a(15) =1a(16) =175a(17) =1750a(18) =1750a(19) =175a(20) =1a(21) =1a(22) =336a(23) =7350a(24) =19600a(25) =7350a(26) =336a(27) =1a(28) =1a(29) =588
External references
- oeis: A142470