

A133081


An interpolation operator, companion to A133080.


3



1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1
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OFFSET

1,1


COMMENTS

A133081 * [1,2,3,...] = A133090: (1, 1, 5, 3, 9, 5, 13, 7, 17,...). A133080: diagonal and subdiagonal are switched.


LINKS

Table of n, a(n) for n=1..45.


FORMULA

Infinite lower triangular matrix, (1,0,1,0,...) in the main diagonal and (1,1,1,...) in the subdiagonal.


EXAMPLE

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


CROSSREFS

Cf. A133080, A133090, A040001 (row sums).
Sequence in context: A151666 A214284 A191747 * A125999 A073784 A219977
Adjacent sequences: A133078 A133079 A133080 * A133082 A133083 A133084


KEYWORD

nonn,easy,tabl


AUTHOR

Gary W. Adamson, Sep 09 2007


STATUS

approved



