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A134545 A051731 * A004736. 1
1, 3, 1, 4, 2, 1, 7, 4, 2, 1, 6, 4, 3, 2, 1, 12, 8, 5, 3, 2, 1, 8, 6, 5, 4, 3, 2, 1, 15, 11, 8, 6, 4, 3, 2, 1, 13, 10, 8, 6, 5, 4, 3, 2, 1, 18, 14, 11, 9, 7, 5, 4, 3, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row sums = A007437: (1, 4, 7, 14, 16, 31, ...).
Left border = sigma(n), A000203: (1, 3, 4, 7, 6, 12, ...).
LINKS
FORMULA
A051731 * A004736 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
3, 1;
4, 2, 1;
7, 4, 2, 1;
6, 4, 3, 2, 1;
12, 8, 5, 3, 2, 1;
8, 6, 5, 4, 3, 2, 1;
15, 11, 8, 6, 4, 3, 2, 1;
...
CROSSREFS
Sequence in context: A135821 A289205 A283866 * A174907 A237016 A135822
KEYWORD
nonn,tabl,more
AUTHOR
Gary W. Adamson, Oct 31 2007
STATUS
approved

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Last modified February 26 22:44 EST 2024. Contains 370354 sequences. (Running on oeis4.)