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A154685
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Triangle read by rows where T(m,n)=2mn+m+n+4
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8
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8, 11, 16, 14, 21, 28, 17, 26, 35, 44, 20, 31, 42, 53, 64, 23, 36, 49, 62, 75, 88, 26, 41, 56, 71, 86, 101, 116, 29, 46, 63, 80, 97, 114, 131, 148, 32, 51, 70, 89, 108, 127, 146, 165, 184, 35, 56, 77, 98, 119, 140, 161, 182, 203, 224
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The terms form a subset of A153039 because 2*T(m,n)-7=(2n+1)(2m+1) are not prime.
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LINKS
| Vincenzo Librandi, Rows n = 1..100, flattened
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EXAMPLE
| Triangle begins:
8;
11, 16;
14, 21, 28;
17, 26, 35, 44;
20, 31, 42, 53, 64;
23, 36, 49, 62, 75, 88;
26, 41, 56, 71, 86, 101, 116;
29, 46, 63, 80, 97, 114, 131, 148;
32, 51, 70, 89, 108, 127, 146, 165, 184;
35, 56, 77, 98, 119, 140, 161, 182, 203, 224;
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MATHEMATICA
| Flatten@Table[2*n*m+m+n+4, {n, 20}, {m, n}] (* Vincenzo Librandi, Jan 29 2012 *)
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PROG
| (PARI) for(m=1, 9, for(n=1, m, print1(2*m*n+m+n+4", "))) \\ Charles R Greathouse IV, Dec 27 2011
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CROSSREFS
| Cf. A153039, A089192
Row sums: A151675. - N. J. A. Sloane, May 31 2009
Sequence in context: A078117 A032423 A063724 * A068591 A065348 A155717
Adjacent sequences: A154682 A154683 A154684 * A154686 A154687 A154688
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KEYWORD
| nonn,tabl,easy
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 18 2009
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EXTENSIONS
| Clarified comment. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 24 2009
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