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Search: id:A121869
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| A121869 |
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Monthly Problem 10791, first expression. |
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+0
2
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| -1, 1, 0, -5, -15, 104, 1827, 7893, -207000, -5646249, -47897675, 1479282600, 74711288407, 1396956334921, -21032523700672, -2719998717430365, -104158663871982343, -715846242343471272, 189941380201812700699, 14820744271258596866013, 507768838531742620183176
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OFFSET
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0,4
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REFERENCES
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A. Fekete and others, Problem 10791, Amer. Math. Monthly, 108 (No. 2, 2001), 177-178.
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FORMULA
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Equals A024429(n)^2 - A024430(n)^2.
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CROSSREFS
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Cf. A121870, A024429, A024430, A121867, A121868.
Sequence in context: A058820 A054363 A134135 this_sequence A118412 A068622 A080449
Adjacent sequences: A121866 A121867 A121868 this_sequence A121870 A121871 A121872
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KEYWORD
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sign
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2006
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