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A144334 Triangle read by rows, A144328^2 1
1, 2, 1, 4, 3, 4, 7, 6, 10, 9, 11, 10, 18, 21, 16, 16, 15, 28, 36, 36, 25, 22, 21, 40, 54, 60, 55, 36, 29, 28, 54, 75, 88, 90, 78, 49, 37, 36, 70, 99, 120, 130, 126, 105, 64, 46, 45, 88, 126, 156, 175, 180, 168, 136, 81, 56, 55, 108, 156, 196, 225, 240, 238, 216, 171, 100 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row sums = A144335: (1, 3, 11, 32, 76, 156, 288,...).
Left border = A000124.
LINKS
EXAMPLE
First few rows of the triangle =
1;
2, 1
4, 3, 4;
7, 6, 10, 9;
11, 10, 18, 21, 16;
16, 15, 28, 36, 36, 25;
22, 21, 40, 54, 60, 55, 36;
29, 28, 54, 75, 88, 90, 78, 49;
...
CROSSREFS
Sequence in context: A316433 A071046 A324757 * A141210 A244373 A107640
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Sep 18 2008
STATUS
approved

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Last modified May 21 08:56 EDT 2024. Contains 372733 sequences. (Running on oeis4.)