A191971 Square array A(i,j) related to the square array T(i,j) of A192062

2, 2, 1, 2, 1, 2, 2, 1, 3, 3, 2, 1, 4, 4, 2, 2, 1, 5, 5, 7, 5, 2, 1, 6, 6, 14, 11, 2, 2, 1, 7, 7, 23, 19, 18, 7, 2, 1, 8, 8, 34, 29, 52, 29, 2, 2, 1, 9, 9, 47, 41, 110, 71, 47, 9, 2, 1, 10, 10, 62, 55, 198, 139, 194, 76, 2, 2, 1, 11, 11, 79, 71, 322, 239, 527, 265, 123, 11, 2, 1, 12, 12, 98, 89, 488, 377, 1154, 666, 724, 199, 2

Offset

0,1

Comments

A(i,j) * T(i,j) of A192062 equals T(2*i,j) of A192062. Here j goes from 0 to 12

Links

Table of n, a(n) for n=0..90.

Formula

Each column is defined as follows. A(0,j) = 2, A(1,j) = 1, For i>0 A(2*i,j) = j*A(2*i-1,j)+A(2*i-2,j), A(2*i+1,j) = A(2*i,j)+A(2*i-1,j).

For i > 1, A(i+2,j) = A(i,j)*(j+2) - A(i-2,j)

A(6*i,j) = A(2*i,j)*(A(4*i,j)-1)

A(6*i+3,j) = A(2*i+1,j)*(A(4*i+2,j)+1)

Example

A(3,1) = 4

Crossrefs

A192062

Sequence in context: A127439 A218775 A370558 * A374209 A156051 A091267

Adjacent sequences: A191968 A191969 A191970 * A191972 A191973 A191974

Keyword

nonn,tabl

Author

Kenneth J Ramsey, Jul 07 2011

Status

approved