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A054971
n(5n-3)/2 is a palindromic heptagonal number.
+0
3
1, 2, 5, 16, 38, 44, 156, 583, 1359, 1470, 1556, 53537, 158476, 161656, 171657, 190914, 371778, 382173, 615769, 1207698, 1686537, 16943262, 88274141, 496329416, 765609041, 1820198063, 2497949426, 2850685772, 15911875336
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Maintained by
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
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