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A001570 Numbers n such that n^2 is simultaneously square and centered hexagonal.
(Formerly M4915 N2108)
+0
35
1, 13, 181, 2521, 35113, 489061, 6811741, 94875313, 1321442641, 18405321661, 256353060613, 3570537526921, 49731172316281, 692665874901013, 9647591076297901, 134373609193269601, 1871582937629476513, 26067787517619401581, 363077442309042145621 (list; graph; listen)
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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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