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

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 =
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;
...

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