Triangular array T read by rows: T(n,0)=T(n,n)=1 for n >= 0; for n >= 2 and 1<=k<=n-1, if n is odd, then T(n,k)=T(n-1,k-1)+T(n-2,k-1)+T(n-1,k) if k is odd and <=[ n/2 ] or if k is even and >[ n/2 ]; in all other cases, T(n,k)=T(n-1,k-1)+T(n-1,k).
A026659
Triangular array T read by rows: T(n,0)=T(n,n)=1 for n >= 0; for n >= 2 and 1<=k<=n-1, if n is odd, then T(n,k)=T(n-1,k-1)+T(n-2,k-1)+T(n-1,k) if k is odd and <=[ n/2 ] or if k is even and >[ n/2 ]; in all other cases, T(n,k)=T(n-1,k-1)+T(n-1,k).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =5a(12) =8a(13) =5a(14) =1a(15) =1a(16) =7a(17) =13a(18) =13a(19) =7a(20) =1a(21) =1a(22) =8a(23) =20a(24) =26a(25) =20a(26) =8a(27) =1a(28) =1a(29) =10
External references
- oeis: A026659