Triangle T(n,m) read by rows: T(n,0)=T(n,n)=1, else T(n,m) = binomial(n,m) + 2^(2*n-3)*binomial(n-2,m-1).
A173152
Triangle T(n,m) read by rows: T(n,0)=T(n,n)=1, else T(n,m) = binomial(n,m) + 2^(2*n-3)*binomial(n-2,m-1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =11a(8) =11a(9) =1a(10) =1a(11) =36a(12) =70a(13) =36a(14) =1a(15) =1a(16) =133a(17) =394a(18) =394a(19) =133a(20) =1a(21) =1a(22) =518a(23) =2063a(24) =3092a(25) =2063a(26) =518a(27) =1a(28) =1a(29) =2055
External references
- oeis: A173152