A134061 - OEIS

A134061

Triangle, A124928 + A134059 - A007318.

1, 3, 5, 3, 10, 5, 3, 15, 15, 5, 3, 20, 30, 20, 5, 3, 25, 50, 50, 25, 5, 3, 30, 75, 100, 75, 30, 5, 3, 35, 105, 175, 175, 105, 35, 5, 3, 40, 140, 280, 350, 280, 140, 40, 5, 3, 45, 180, 420, 630, 630, 420, 180, 45, 5

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

OFFSET

0,2

COMMENTS

Row sums = A134062: (1, 8, 18, 38, 78, 158, ...).

LINKS

Table of n, a(n) for n=0..54.

FORMULA

Triangle, A124928 + A134059 - A007318 as infinite lower triangular matrices. T(n,k) = 5*binomial(n,k) if k > 0, (0 <= k <= n), with leftmost column = (1,3,3,3,...).

EXAMPLE

First few rows of the triangle:

3, 5;

3, 10, 5;

3, 15, 15, 5;

3, 20, 30, 20, 5;

3, 25, 50, 50, 25, 5;

...

CROSSREFS

Cf. A124928, A134059, A134062.

Sequence in context: A070554 A076842 A077862 * A336872 A167221 A177930

Adjacent sequences: A134058 A134059 A134060 * A134062 A134063 A134064

KEYWORD

nonn,tabl,more

AUTHOR

Gary W. Adamson, Oct 05 2007

STATUS

approved