A130124 Triangle defined by A130123 * A002260, read by rows.

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

Offset: 1

Author

Gary W. Adamson, May 11 2007

Keywords

• nonn
• tabl

Comments

Row sums = A001780, (1, 6, 24, 80, 240, ...).

Examples

			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; ...
		

Links

• G. C. Greubel, Rows n = 1..100 of triangle, flattened

Crossrefs

Cf. A001780, A130123, A002260.

Programs

GAP

Flat(List([1..12], n-> List([1..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

Mathematica

Table[2^(n-1)*k, {n,1,12}, {k,1,n}]//Flatten (* G. C. Greubel, Jun 05 2019 *)

PARI

{T(n,k) = 2^(n-1)*k}; \\ 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

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

Extensions

More terms added by G. C. Greubel, Jun 05 2019