A144337 - OEIS

A144337

Triangle read by rows, A000012 * (2*A144328 - A000012).

1, 2, 1, 3, 2, 3, 4, 3, 6, 5, 5, 4, 9, 10, 7, 6, 5, 12, 15, 14, 9, 7, 6, 15, 20, 21, 18, 11, 8, 7, 18, 25, 28, 27, 22, 13, 9, 8, 21, 30, 35, 36, 33, 26, 15, 10, 9, 24, 35, 42, 45, 44, 39, 30, 17, 11, 10, 27, 40, 49, 54, 55, 52, 45, 34, 19

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

OFFSET

1,2

COMMENTS

When the first column is removed from this triangle (A144337), the result is triangle A101447. - Georg Fischer, Aug 10 2023

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

First few rows of the triangle:

2, 1;

3, 2, 3;

4, 3, 6, 5;

5, 4, 9, 10, 7;

6, 5, 12, 15, 14, 9;

7, 6, 15, 20, 21, 18, 11;

8, 7, 18, 25, 28, 27, 22, 13;

9, 8, 21, 30, 35, 36, 33, 26, 15;

10, 9, 24, 35, 42, 45, 44, 39, 30, 17;

...

CROSSREFS

Cf. A081489, A101447, A144328.

Sequence in context: A340351 A115872 A133926 * A143929 A153583 A346797

Adjacent sequences: A144334 A144335 A144336 * A144338 A144339 A144340

KEYWORD

nonn,tabl

AUTHOR

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

EXTENSIONS

a(25) corrected by Georg Fischer, Aug 10 2023

STATUS

approved