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A333037 Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7. 5
4, 0, 0, 0, 0, 84, 20, 0, 0, 0, 380, 180, 0, 8, 0, 1076, 764, 40, 20, 0, 2380, 2316, 64, 48, 0, 4716, 5188, 224, 52, 0, 8236, 10492, 360, 92, 0, 13620, 18772, 632, 108, 0, 21188, 31380, 864, 196, 0, 31596, 49228, 1376, 224, 8, 44980, 74268, 1920, 272, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See the links in A331456 for images of the crosses.

LINKS

Table of n, a(n) for n=0..54.

EXAMPLE

Table begins:

4, 0, 0, 0, 0

84, 20, 0, 0, 0

380, 180, 0, 8, 0

1076, 764, 40, 20, 0

2380, 2316, 64, 48, 0

4716, 5188, 224, 52, 0

8236, 10492, 360, 92, 0

13620, 18772, 632, 108, 0

21188, 31380, 864, 196, 0

31596, 49228, 1376, 224, 8

44980, 74268, 1920, 272, 8

The row sums are A331456.

CROSSREFS

Cf. A331456 (regions), A333035 (vertices), A333036 (edges), A331451, A332723, A333025.

Sequence in context: A290322 A274948 A005925 * A070206 A228368 A267701

Adjacent sequences:  A333034 A333035 A333036 * A333038 A333039 A333040

KEYWORD

nonn,more,tabf

AUTHOR

Scott R. Shannon and N. J. A. Sloane, Mar 06 2020

STATUS

approved

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Last modified June 4 11:05 EDT 2020. Contains 334825 sequences. (Running on oeis4.)