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Search: id:A067705
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A067705 Numbers such that 11 (11 + n) is a perfect square. +0
2
33, 88, 165, 264, 385, 528, 693, 880, 1089, 1320, 1573, 1848, 2145, 2464, 2805, 3168, 3553, 3960, 4389, 4840, 5313, 5808, 6325, 6864, 7425, 8008, 8613, 9240, 9889, 10560, 11253, 11968, 12705, 13464, 14245, 15048, 15873, 16720, 17589, 18480 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n+1)= 11*n*n +44*n +33 (frank.ellermann(AT)t-online.de).

MATHEMATICA

Select[ Range[20000], IntegerQ[ Sqrt[ 11(11 + # )]] & ]

CROSSREFS

Cf. A067724-A067728 (if 11 is replaced by 3, 5, 6, 7, 8 respectively), A067707 (12).

Sequence in context: A039833 A080700 A080200 this_sequence A075213 A114069 A165378

Adjacent sequences: A067702 A067703 A067704 this_sequence A067706 A067707 A067708

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 05 2002

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.


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