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 A265141 Irregular table read by rows: n-th row lists the 9 n-gonal numbers of a 3 X 3 semimagic square with the smallest magic sum. The terms of each row are arranged in the manner shown in A261816. 6
 15, 66, 630, 231, 435, 45, 465, 210, 36, 16, 529, 2704, 1024, 1936, 289, 2209, 784, 256, 651, 54626, 356972, 135751, 241001, 35497, 275847, 116622, 19780, 6, 39621, 481671, 158766, 345696, 16836, 362526, 135981, 22791, 697, 93799, 662290, 298771, 448804, 9211, 457318, 214183, 85285 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS The squares presented in this sequence are basic semimagic. For a definition of basic semimagic squares, see A261816. The magic constants are, respectively: 711 = A269060(1), 3249 = 57^2 = A269061(1), and 412249. LINKS Arkadiusz Wesolowski, Rows n = 3..8, flattened Eric Weisstein's World of Mathematics, Polygonal Number EXAMPLE The semimagic squares are: triangular numbers |---|---|---| | 15| 66|630| |---|---|---| |231|435| 45| |---|---|---| |465|210| 36| |---|---|---| . square numbers |----|----|----| | 16 | 529|2704| |----|----|----| |1024|1936| 289| |----|----|----| |2209| 784| 256| |----|----|----| . pentagonal numbers |------|------|------| |  651 | 54626|356972| |------|------|------| |135751|241001| 35497| |------|------|------| |275847|116622| 19780| |------|------|------| CROSSREFS Cf. A269060, A269061, A265142. Sequence in context: A088058 A062392 A211787 * A336624 A211917 A015876 Adjacent sequences:  A265138 A265139 A265140 * A265142 A265143 A265144 KEYWORD nonn,tabf AUTHOR Arkadiusz Wesolowski, Dec 02 2015 EXTENSIONS More terms from Arkadiusz Wesolowski, Apr 03 2016 STATUS approved

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Last modified May 28 15:04 EDT 2022. Contains 354115 sequences. (Running on oeis4.)