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Search: id:A162245
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| A162245 |
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Triangle T(n,m) = 6*m*n+3*m+3*n+1 read by rows. |
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+0
3
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| 13, 22, 37, 31, 52, 73, 40, 67, 94, 121, 49, 82, 115, 148, 181, 58, 97, 136, 175, 214, 253, 67, 112, 157, 202, 247, 292, 337, 76, 127, 178, 229, 280, 331, 382, 433, 85, 142, 199, 256, 313, 370, 427, 484, 541, 94, 157, 220, 283, 346, 409, 472, 535, 598, 661
(list; table; graph; listen)
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OFFSET
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1,1
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FORMULA
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Row sums: sum_{m=1..n} T(n,m) = n*(5+6*n^2+15*n)/2. - R. J. Mathar, Jul 26 2009
T(n,m)=3*A083487(n,m)+1. - R. J. Mathar, Jul 26 2009
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EXAMPLE
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Triangle begins:
13;
22,37;
31,52,73;
40,67,94,121;
49,82,115,148,181;
58,97,136,175,214,253;
67,112,157,202,247,292,337;
76,127,178,229,280,331,382,433;
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CROSSREFS
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Sequence in context: A164504 A164413 A164441 this_sequence A159302 A164412 A164472
Adjacent sequences: A162242 A162243 A162244 this_sequence A162246 A162247 A162248
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KEYWORD
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nonn,tabl,easy
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jun 28 2009
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 26 2009
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