A134478 Triangle read by rows, T(0,0) = 1; n-th row = (n+1) terms of n, n+1, n+2, ...

1, 1, 2, 2, 3, 4, 3, 4, 5, 6, 4, 5, 6, 7, 8, 5, 6, 7, 8, 9, 10, 6, 7, 8, 9, 10, 11, 12, 7, 8, 9, 10, 11, 12, 13, 14, 8, 9, 10, 11, 12, 13, 14, 15, 16, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18

Offset: 0

Author

Gary W. Adamson, Oct 27 2007

Keywords

• nonn
• less
• tabl

Comments

Apart from the irregular choice of T(0,0) the same as A051162. - R. J. Mathar, Mar 28 2012

Examples

			First few rows of the triangle:
  1;
  1, 2;
  2, 3, 4;
  3, 4, 5,  6;
  4, 5, 6,  7,  8;
  5, 6, 7,  8,  9, 10;
  6, 7, 8,  9, 10, 11, 12;
  7, 8, 9, 10, 11, 12, 13, 14;
  ...
		

Links

• G. C. Greubel, Table of n, a(n) for the first 100 rows, flattened

Crossrefs

Cf. A051162, A134479 (row sums), A126804 (row products).

Programs

Mathematica

Join[{1},Flatten[Table[Range[n,2n],{n,10}]]] (* Harvey P. Dale, Nov 21 2014 *)

PARI

concat([1], for(n=1,10, for(k=0,n, print1(n+k, ", ")))) \\ G. C. Greubel, Sep 24 2017