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Search: id:A121488
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A121488 8*n^2 - [n*sqrt(8)]^2, where [ ] denotes the floor function. +0
1
4, 7, 8, 7, 4, 32, 31, 28, 23, 16, 7, 63, 56, 47, 36, 23, 8, 92, 79, 64, 47, 28, 7, 119, 100, 79, 56, 31, 4, 144, 119, 92, 63, 32, 196, 167, 136, 103, 68, 31, 223, 188, 151, 112, 71, 28, 248, 207, 164, 119, 72, 23, 271, 224, 175, 124, 71, 16, 292, 239, 184, 127, 68, 7 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = 8*n^2 - [n*sqrt(8)]^2.

EXAMPLE

a(2) = 8*2^2-[2*sqrt(8)]^2 = 32-25 = 7.

CROSSREFS

Sequence in context: A115632 A021213 A115021 this_sequence A115291 A108615 A090383

Adjacent sequences: A121485 A121486 A121487 this_sequence A121489 A121490 A121491

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu), Aug 02 2006

page 1

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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