A134315 A134309 * A097806.

1, 1, 1, 0, 2, 2, 0, 0, 4, 4, 0, 0, 0, 8, 8, 0, 0, 0, 0, 16, 16, 0, 0, 0, 0, 0, 32, 32, 0, 0, 0, 0, 0, 0, 64, 64

Offset

1,5

Comments

A134315 * [1,2,3,...] = A128135: (1, 3, 10 28, 72, 176, 416, ...).

Triangle read by rows given by [1,-1,0,0,0,0,0,0,...] DELTA [1,1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938. - Philippe Deléham, Oct 20 2007

Links

Table of n, a(n) for n=1..36.

Formula

A134309 * A134315 as infinite lower triangular matrices. Triangle read by rows, for n>1, (n-1) zeros followed by 2^(n-1), 2^(n-1). As an infinite lower triangular matrix, (1, 1, 2, 4, 8, ...) in the main diagonal and (1, 2, 4, 8, ...) in the subdiagonal.

G.f.: (-1-x+x*y)/(-1+2*x*y). - R. J. Mathar, Aug 11 2015

Example

First few rows of the triangle are:
  1;
  1, 1;
  0, 2, 2;
  0, 0, 4, 4;
  0, 0, 0, 8, 8;
  ...

Crossrefs

Cf. A134309, A097806, A128135.

Sequence in context: A300646 A300776 A301400 * A268584 A119332 A335683

Adjacent sequences: A134312 A134313 A134314 * A134316 A134317 A134318

Keyword

nonn,tabl,easy

Author

Gary W. Adamson, Oct 19 2007

Status

approved