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A001442 G-symmetric Costas arrays of order n that are inequivalent under dihedral group. 3
1, 1, 0, 2, 1, 4, 0, 3, 0, 24, 0, 44, 4, 31, 0, 77, 0, 29, 0, 3, 0, 55, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

REFERENCES

CRC Handbook of Combinatorial Designs, C. Colbourn and J. Dinitz, Editors, 1996, IV.7: Costas Arrays by Herbert Taylor (IV.7.6, page 259, Table 2.29).

LINKS

Table of n, a(n) for n=1..23.

CROSSREFS

Cf. A008404, A001440, A001441, A008403.

Sequence in context: A220504 A087569 A048614 * A226952 A158285 A277994

Adjacent sequences:  A001439 A001440 A001441 * A001443 A001444 A001445

KEYWORD

nonn,hard,more,nice

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 19 15:43 EDT 2020. Contains 337178 sequences. (Running on oeis4.)