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A122590
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a(n) = 2*a(n - 1) - a(n - 2) - (a(n - 1)^2 + a(n - 2)^2).
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0
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OFFSET
| 1,4
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REFERENCES
| S. M. Ulam, Problems in Modern Mathematics, John Wiley and Sons, New York, 1960, page 110
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MATHEMATICA
| a[0] = 1; a[1] = 1; a[n_] := a[n] = 2*a[n - 1] - a[n - 2] - (a[n - 1]^2 + a[n - 2]^2); Table[a[n], {n, 0, 10}]
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CROSSREFS
| Sequence in context: A058015 A053420 A001802 * A057991 A099137 A000871
Adjacent sequences: A122587 A122588 A122589 * A122591 A122592 A122593
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KEYWORD
| sign
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AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 19 2006
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 21 2006
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