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A132774 A natural number operator. 3
1, 2, 3, 0, 4, 5, 0, 0, 6, 7, 0, 0, 0, 8, 9, 0, 0, 0, 0, 10, 11, 0, 0, 0, 0, 0, 12, 13, 0, 0, 0, 0, 0, 0, 14, 15 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A016813: (1, 5, 9, 13,...). A132774 * [1, 2, 3,...] = A033951: (1, 8, 23, 46, 77, 116,...).

LINKS

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

FORMULA

As an infinite lower triangular matrix, (1, 3, 5,...) in the main diagonal and (2, 4, 6,...) in the subdiagonal; with the rest zeros.

EXAMPLE

First few rows of the triangle are:

1;

2, 3;

0, 4, 5;

0, 0, 6, 7;

0, 0, 0, 8, 9;

0, 0, 0, 0, 10, 11;

...

CROSSREFS

Cf. A016813, A033951.

Sequence in context: A175434 A154860 A284282 * A294721 A300816 A007945

Adjacent sequences:  A132771 A132772 A132773 * A132775 A132776 A132777

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 28 2007

STATUS

approved

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Last modified November 21 14:18 EST 2019. Contains 329371 sequences. (Running on oeis4.)