Triangle read by rows: a(n,m) = T[n,m,m] where T[i,j,k] is the 3-dimensional pyramid defined by T[n,m,0]=1 and T[i,j,k]=0 if j>i or k>j and T[i,j,k]=T[i-1,j,k]+T[i,j-1,k]+T[i,j,k-1].
A065078
Triangle read by rows: a(n,m) = T[n,m,m] where T[i,j,k] is the 3-dimensional pyramid defined by T[n,m,0]=1 and T[i,j,k]=0 if j>i or k>j and T[i,j,k]=T[i-1,j,k]+T[i,j-1,k]+T[i,j,k-1].
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =3a(8) =10a(9) =18a(10) =1a(11) =4a(12) =22a(13) =79a(14) =162a(15) =1a(16) =5a(17) =40a(18) =220a(19) =831a(20) =1851a(21) =1a(22) =6a(23) =65a(24) =492a(25) =2681a(26) =10488a(27) =24661a(28) =1a(29) =7
External references
- oeis: A065078