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Search: id:A144238
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| A144238 |
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Number of n X n binary arrays, symmetric under horizontal and vertical reflection, with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise. |
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1
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| 1, 2, 1, 3, 2, 6, 14, 111, 56, 1337, 718, 24951, 27864, 1478458, 1080087, 130135921, 85888038, 18349790023, 15914995870, 5514906021024, 4665956204109
(list; graph; listen)
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