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A028386
Numbers n such that n(3n-1)/2 is a pentagonal palindrome.
+0
3
1, 2, 4, 26, 44, 101, 693, 2173, 2229, 4228, 6010, 26466, 26906, 31926, 44059, 1258723, 1965117, 1979130, 2684561, 13280839, 59401650, 84885761, 100058581, 225563533, 316882086, 700457153, 818049201, 851649306, 1345679688
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Maintained by
N. J. A. Sloane
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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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