A390406 - OEIS

A390406

Row sums of triangle A390419.

2, 1, 3, 17, 185, 2643, 45521, 913193, 21782151, 1118969979, 396000518175, 269893909626817, 210000497997408885, 181136297531929207049, 173216689198993063789205, 185353943205334042472424899, 299074631560917896394161053253, 3934166250454684367660522861367521

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OFFSET

1,1

COMMENTS

a(n) is the total number of ways to place non-attacking kings on an n X n board such that each row contains the same number of kings.

LINKS

Hamidreza Maleki Tirabadi, Table of n, a(n) for n = 1..31

FORMULA

a(n) = Sum_{k=0..floor((n+1)/4)+[n=1]} A390419(n, k).

CROSSREFS

Cf. A390419.

Sequence in context: A209215 A000618 A379941 * A394783 A132950 A197190