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0, 4, 16, 12, 64, 100, 48, 196, 256, 108, 400, 484, 192, 676, 784, 300, 1024, 1156, 432, 1444, 1600, 588, 1936, 2116, 768, 2500, 2704, 972, 3136, 3364, 1200, 3844, 4096, 1452, 4624, 4900, 1728, 5476, 5776, 2028, 6400, 6724, 2352, 7396, 7744, 2700, 8464
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| 4*numerator( n^2/(n^2+3*n+3) ).
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MAPLE
| A046162 := proc(n) (n-1)^2/(n^2+n+1) ; numer(%) ; end proc: A147560 := proc(n) 4*A046162(n+1) ; end proc: seq(A147560(n), n=0..70) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 15 2009]
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CROSSREFS
| Companion to A144437.
Cf. A171522. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 15 2009]
Sequence in context: A061093 A067178 A181717 * A029659 A170836 A170875
Adjacent sequences: A147557 A147558 A147559 * A147561 A147562 A147563
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Nov 07 2008
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 15 2009
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