Triangle, read by rows, where T(n,k) equals the dot product of the vector of terms in row n-1 from T(n-1,k) to T(n-1,n-1) with the vector of terms in column k+1 from T(k+1,k+1) to T(n,k+1): T(n,k) = Sum_{j=0..n-k-1} T(n-1,j+k)*T(j+k+1,k+1) for n>k+1>0, with T(n,n) = 1 and T(n,n-1) = n (n>=1).
A115085
Triangle, read by rows, where T(n,k) equals the dot product of the vector of terms in row n-1 from T(n-1,k) to T(n-1,n-1) with the vector of terms in column k+1 from T(k+1,k+1) to T(n,k+1): T(n,k) = Sum_{j=0..n-k-1} T(n-1,j+k)*T(j+k+1,k+1) for n>k+1>0, with T(n,n) = 1 and T(n,n-1) = n (n>=1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =12a(7) =5a(8) =3a(9) =1a(10) =58a(11) =21a(12) =7a(13) =4a(14) =1a(15) =321a(16) =102a(17) =32a(18) =9a(19) =5a(20) =1a(21) =1963a(22) =579a(23) =158a(24) =45a(25) =11a(26) =6a(27) =1a(28) =13053a(29) =3601
External references
- oeis: A115085