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0, 11, 44, 99, 176, 275, 396, 539, 704, 891, 1100, 1331, 1584, 1859, 2156, 2475, 2816, 3179, 3564, 3971, 4400, 4851, 5324, 5819, 6336, 6875, 7436, 8019, 8624, 9251, 9900, 10571, 11264, 11979, 12716
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Number of edges of the complete tripartite graph of order 7n, K_n,n,5n - Roberto E. Martinez II (remartin(AT)fas.harvard.edu), Jan 07 2002
Number of edges of the complete tripartite graph of order 6n, K_n,2n,3n - Roberto E. Martinez II (remartin(AT)fas.harvard.edu), Jan 07 2002
11 times the squares. [From Omar E. Pol (info(AT)polprimos.com), Dec 13 2008]
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FORMULA
| a(n) = A000290(n)*11. [From Omar E. Pol (info(AT)polprimos.com), Dec 13 2008]
a(n)=22*n+a(n-1)-11 (with a(0)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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EXAMPLE
| a(1)=22*1+0-11=11; a(2)=22*2+11-11=44; a(3)=22*3+44-11=99 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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CROSSREFS
| Cf. A000290. [From Omar E. Pol (info(AT)polprimos.com), Dec 13 2008]
Sequence in context: A022703 A061976 A070930 * A172526 A111080 A022816
Adjacent sequences: A033581 A033582 A033583 * A033585 A033586 A033587
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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