OFFSET
0,1
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
KEYWORD
nonn,tabl
AUTHOR
Kenneth J Ramsey, Jul 07 2011
STATUS
approved