A136157 Triangle by columns, (3, 1, 0, 0, 0, ...) in every column.

3, 1, 3, 0, 1, 3, 0, 0, 1, 3, 0, 0, 0, 1, 3, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3

Offset

1,1

Comments

Triangle A136158 is generated from A136157.

Links

Table of n, a(n) for n=1..78.

Formula

Triangle by columns, (3, 1, 0, 0, 0, ...) in every column. By rows, for n>1, (n-1) zeros followed by 1, 3. Infinite lower triangular matrix with (3, 3, 3, ...) in the main diagonal and (1, 1, 1, ...) in the subdiagonal, with the rest zeros.

Example

First few rows of the triangle:
  3;
  1, 3;
  0, 1, 3;
  0, 0, 1, 3;
  0, 0, 0, 1, 3;
  0, 0, 0, 0, 1, 3;
  ...

Mathematica

Table[PadLeft[{1, 3}, n, {0}], {n, 20}]//Flatten (* Harvey P. Dale, Apr 04 2018 *)

Crossrefs

Cf. A136158.

Sequence in context: A167274 A201679 A131088 * A266260 A143353 A127172

Adjacent sequences: A136154 A136155 A136156 * A136158 A136159 A136160

Keyword

nonn,tabl

Author

Gary W. Adamson, Dec 16 2007

Status

approved