A089841 Main diagonal of A089839. a(n) = A089839(n,n).

0, 0, 0, 0, 6, 0, 4, 0, 0, 11, 0, 9, 1653699, 1653578, 1654426, 1654694, 1654312, 1655572, 1654937, 1655787, 1655152, 1654694, 0, 0, 26, 0, 24, 0, 0, 35, 37, 43, 41, 0, 40, 29, 41, 0, 28, 0, 34, 0, 28, 31, 37, 0, 0, 49, 0, 47, 0, 0, 58, 60, 66, 64, 0, 63, 52

Offset: 0

Author

Antti Karttunen, Dec 05 2003

Keywords

• nonn

Comments

When a(n) is 0, the corresponding row in A089840 (referred here as A089840[n]) is an involution.

Links

• A. Karttunen, C-program for computing the initial terms of this sequence