A199696 Products of distinct terms in n-th row of the triangle in A199333.

1, 1, 2, 3, 35, 91, 7337, 25493, 9351479, 42980489, 78695113801, 584834423801, 4754839123536133, 43472885623916761, 1887750276489057845213, 21019416307292530253881, 4675204650607654300508731931, 77008997457626136207428248409

Offset: 0

Author

Reinhard Zumkeller, Nov 09 2011

Keywords

• nonn

Comments

a(n) = Product_{k=0..floor(n/2)} A199333(n,k);

A020639(a(n)) = A008578(n);

A006530(a(n)) = A199582(n).

Programs

Haskell

a199696 n = product . (take (n `div` 2 + 1)) $ a199333_row n

Formula

a(n) = A007947(A199695(n)).