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A274948 Irregular triangle read by rows: T(n,k) (n>=1, 0 <= k <= n^2) = maximal number of squares not attacked by any arrangement of k queens on an n X board = n^2 - A274947(n,k). 3
1, 0, 4, 0, 0, 0, 0, 9, 2, 1, 0, 0, 0, 0, 0, 0, 0, 16, 6, 3, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 12, 7, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

For further information see A274947, which is the main entry for this problem.

LINKS

Table of n, a(n) for n=1..62.

EXAMPLE

The triangle begins:

1,0,

4, 0, 0, 0, 0,

9, 2, 1, 0, 0, 0, 0, 0, 0, 0,

16, 6, 3, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

25, 12, 7, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

...

CROSSREFS

Cf. A247947, A250000.

Sequence in context: A276580 A108708 A290322 * A005925 A070206 A228368

Adjacent sequences:  A274945 A274946 A274947 * A274949 A274950 A274951

KEYWORD

nonn,tabf,more

AUTHOR

N. J. A. Sloane, Jul 27 2016

EXTENSIONS

Corrections and more terms from Andrey Zabolotskiy, Jul 29 2016

STATUS

approved

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Last modified October 20 23:39 EDT 2018. Contains 316405 sequences. (Running on oeis4.)