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A089841 Main diagonal of A089839. a(n) = A089839(n,n). 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

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

LINKS

Table of n, a(n) for n=0..58.

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

CROSSREFS

Sequence in context: A019115 A229637 A019109 * A202542 A019766 A094830

Adjacent sequences:  A089838 A089839 A089840 * A089842 A089843 A089844

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 05 2003

STATUS

approved

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Last modified November 15 01:07 EST 2019. Contains 329142 sequences. (Running on oeis4.)