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A147973 -2n^2 + 12n - 14. 2
-4, 2, 4, 2, -4, -14, -28, -46, -68, -94, -124, -158, -196, -238, -284, -334, -388, -446, -508, -574, -644, -718, -796, -878, -964, -1054, -1148, -1246, -1348, -1454, -1564, -1678, -1796, -1918, -2044, -2174, -2308, -2446, -2588, -2734, -2884 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Index entries for sequences related to linear recurrences with constant coefficients, signature (3,-3,1).

MATHEMATICA

lst={}; Do[k=n^2-((n-1)^2+(n-2)^2+(n-3)^2); AppendTo[lst, k], {n, 5!}]; lst

CROSSREFS

Sequence in context: A064127 A178253 A105397 * A010474 A064887 A114424

Adjacent sequences:  A147970 A147971 A147972 * A147974 A147975 A147976

KEYWORD

sign,easy

AUTHOR

Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 18 2008

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Last modified February 15 12:25 EST 2012. Contains 205786 sequences.