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Search: id:A087212
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| A087212 |
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Number of ways in which n X n cells may be numbered using nonzero digits so that n n-digit squares are formed when read across or down the grids. |
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+0
1
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| 4, 10, 1, 16, 17, 13, 12, 11, 11, 9, 8, 2
(list; graph; listen)
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OFFSET
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2,1
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COMMENT
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Sequence conjectured to be complete.
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REFERENCES
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G. Cesaro, Commentary on Problem 2230 "Squaring the square", pp. 311 Journal of Recreational Mathematics, vol. 29 No.4 1998 Baywood NY.
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EXAMPLE
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The 4 possibilities for n=2 are:
| 1 6 | 3 6 | 8 1 | 6 4 |
| 6 4 | 6 4 | 1 6 | 4 9 |
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CROSSREFS
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Sequence in context: A051499 A008345 A016488 this_sequence A048870 A070261 A054048
Adjacent sequences: A087209 A087210 A087211 this_sequence A087213 A087214 A087215
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KEYWORD
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nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Oct 30 2003
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