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A090461
Numbers n such that there is a permutation of the numbers 1 to n such that the sum of adjacent numbers is a square.
+0
5
15, 16, 17, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.
AT&T Labs Research
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