Triangle t(n,m)= binomial(n+m-1,n-1) + binomial(2*n-m-1,n-1) -binomial(2*n-1,n-1) read by rows, 0<=m<=n.
A174952
Triangle t(n,m)= binomial(n+m-1,n-1) + binomial(2*n-m-1,n-1) -binomial(2*n-1,n-1) read by rows, 0<=m<=n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =-1a(8) =-1a(9) =1a(10) =1a(11) =-11a(12) =-15a(13) =-11a(14) =1a(15) =1a(16) =-51a(17) =-76a(18) =-76a(19) =-51a(20) =1a(21) =1a(22) =-204a(23) =-315a(24) =-350a(25) =-315a(26) =-204a(27) =1a(28) =1a(29) =-785
External references
- oeis: A174952