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 A130124 Triangle defined by A130123 * A002260, read by rows. 2
 1, 2, 4, 4, 8, 12, 8, 16, 24, 32, 16, 32, 48, 64, 80, 32, 64, 96, 128, 160, 192, 64, 128, 192, 256, 320, 384, 448, 128, 256, 384, 512, 640, 768, 896, 1024, 256, 512, 768, 1024, 1280, 1536, 1792, 2048, 2304, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096, 4608, 5120 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = A001780, (1, 6, 24, 80, 240, ...). LINKS G. C. Greubel, Rows n = 1..100 of triangle, flattened FORMULA A130123 * A002260, where A130123 = the 2^n transform and A002260 = [1; 1, 2; 1, 2, 3; ...). T(n, k) = 2^(n-1)*k. - G. C. Greubel, Jun 05 2019 EXAMPLE First few rows of the triangle are: 1; 2, 4; 4, 8, 12; 8, 16, 24, 32; 16, 32, 48, 64, 80; 32, 64, 96, 128, 160, 192; ... MATHEMATICA Table[2^(n-1)*k, {n, 1, 12}, {k, 1, n}]//Flatten (* G. C. Greubel, Jun 05 2019 *) PROG (PARI) {T(n, k) = 2^(n-1)*k}; \\ G. C. Greubel, Jun 05 2019 (Magma) [[2^(n-1)*k: k in [1..n]]: n in [1..12]]; // G. C. Greubel, Jun 05 2019 (Sage) [[2^(n-1)*k for k in (1..n)] for n in (1..12)] # G. C. Greubel, Jun 05 2019 (GAP) Flat(List([1..12], n-> List([1..n], k-> 2^(n-1)*k ))); # G. C. Greubel, Jun 05 2019 CROSSREFS Cf. A001780, A130123, A002260. Sequence in context: A338986 A319803 A055946 * A265417 A076342 A135268 Adjacent sequences: A130121 A130122 A130123 * A130125 A130126 A130127 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, May 11 2007 EXTENSIONS More terms added by G. C. Greubel, Jun 05 2019 STATUS approved

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Last modified December 5 14:39 EST 2023. Contains 367592 sequences. (Running on oeis4.)