OFFSET

1,2

COMMENTS

Row sums = A143270: (1, 4, 12, 24, 50, 72, 126, 176,...).

EXAMPLE

First few rows of the triangle =

1;

2, 2;

3, 3, 6;

4, 4, 8, 8;

5, 5, 10, 10, 20;

6, 6, 12, 12, 24, 12;

7, 7, 14, 1428, 14, 42;

...

Row 5 = (5, 5, 10, 10, 20) = (5*1, 5*1, 5*2, 5*2, 5*4); where phi(k) = (1, 1, 2, 2, 4,...).

CROSSREFS

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Aug 03 2008

STATUS

approved