A144336 - OEIS

A144336

Triangle read by rows, 2*A144328 - A007318^(-1)

1, 3, 1, 1, 4, 3, 3, -1, 7, 5, 1, 6, -2, 10, 7, 3, -3, 14, -4, 13, 9, 1, 8, -11, 26, -7, 16, 11, 3, -5, 25, -29, 43, -11, 19, 13, 1, 10, -24, 62, -62, 66, -16, 22, 15, 3, -7, 40, -78, 134, -116, 96, -22, 25, 17

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Row sums = A003682: (1, 4, 8, 14, 22, 32, 44,...).

LINKS

Table of n, a(n) for n=1..55.

FORMULA

Twice triangle A144328 minus the inverse of Pascal's triangle.

EXAMPLE

First few rows of the triangle =

3, 1;

1, 4, 3

3, -1, 7, 5;

1, 6, -2, 10, 7;

3, -3, 14, -4, 13, 9;

1, 8, -11, 26, -7, 16, 11;

3, -5, 25, -29, 43, -11, 19, 13;

...

CROSSREFS

A144328, Cf. A003682

Sequence in context: A049999 A126015 A247169 * A036040 A080575 A205117

Adjacent sequences: A144333 A144334 A144335 * A144337 A144338 A144339

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson & Roger L. Bagula, Sep 18 2008

STATUS

approved