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

0,3

Comments

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

Links

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

Example

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;
  ...

Mathematica

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

Prog

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

Crossrefs

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

Sequence in context: A204006 A369879 A106251 * A051162 A122872 A356998

Adjacent sequences: A134475 A134476 A134477 * A134479 A134480 A134481

Keyword

nonn,less,tabl

Author

Gary W. Adamson, Oct 27 2007

Status

approved