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A337661
Triangular array read by rows: T(n,k) = A337655(n) * A337655(k), for 1 <= k <= n.
8
1, 2, 4, 5, 10, 25, 7, 14, 35, 49, 15, 30, 75, 105, 225, 22, 44, 110, 154, 330, 484, 31, 62, 155, 217, 465, 682, 961, 50, 100, 250, 350, 750, 1100, 1550, 2500, 68, 136, 340, 476, 1020, 1496, 2108, 3400, 4624, 90, 180, 450, 630, 1350, 1980, 2790, 4500, 6120, 8100
OFFSET
1,2
COMMENTS
This is the lower triangular part of the multiplication table from A337655, read by rows.
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 rows, flattened)
EXAMPLE
The multiplication table from A337655 begins:
1, 2, 5, 7, 15, 22, 31, 50, 68, 90, ...
2, 4, 10, 14, 30, 44, 62, 100, 136, 180, ...
5, 10, 25, 35, 75, 110, 155, 250, 340, 450, ...
7, 14, 35, 49, 105, 154, 217, 350, 476, 630, ...
15, 30, 75, 105, 225, 330, 465, 750, 1020, 1350, ...
22, 44, 110, 154, 330, 484, 682, 1100, 1496, 1980, ...
31, 62, 155, 217, 465, 682, 961, 1550, 2108, 2790, ...
50, 100, 250, 350, 750, 1100, 1550, 2500, 3400, 4500, ...
68, 136, 340, 476, 1020, 1496, 2108, 3400, 4624, 6120, ...
90, 180, 450, 630, 1350, 1980, 2790, 4500, 6120, 8100, ...
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Oct 03 2020
STATUS
approved