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 A154618 Triangle read by rows: integer values of T(n,m) = (4*m*n+2*m+2*n-3)/3. 1
 7, 15, 17, 39, 29, 55, 27, 61, 95, 43, 81, 119, 37, 83, 129, 175, 57, 107, 157, 207, 47, 105, 163, 221, 279, 71, 133, 195, 257, 319, 57, 127, 197, 267, 337, 407, 85, 159, 233, 307, 381, 455, 67, 149, 231, 313, 395, 477, 559, 99, 185, 271, 357, 443, 529, 615, 77 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..57. EXAMPLE The sequence contains the integers selected from the full table: 5/3; 11/3,7; 17/3,31/3,15; 23/3,41/3,59/3,77/3; 29/3,17,73/3,95/3,39; 35/3,61/3,29,113/3,139/3,55; 41/3,71/3,101/3,131/3,161/3,191/3,221/3; 47/3,27,115/3,149/3,61,217/3,251/3,95; MATHEMATICA Select[Flatten[Table[(4*m*n+2*m+2*n-3)/3, {m, 30}, {n, m}]], IntegerQ] (* Harvey P. Dale, Jun 10 2015 *) CROSSREFS Cf. A034936, A154616 Sequence in context: A216848 A065566 A329485 * A275190 A224891 A138641 Adjacent sequences: A154615 A154616 A154617 * A154619 A154620 A154621 KEYWORD nonn,tabf AUTHOR Vincenzo Librandi, Jan 16 2009 EXTENSIONS Keyword:tabl removed, appearance of fractions clarified by R. J. Mathar, Oct 16 2009 STATUS approved

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Last modified February 26 11:46 EST 2024. Contains 370352 sequences. (Running on oeis4.)