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A338033 Triangular array read by rows: T(n,k) = A337656(n) * A337656(k) for 1 <= k <= n. 4
0, 0, 1, 0, 3, 9, 0, 7, 21, 49, 0, 12, 36, 84, 144, 0, 20, 60, 140, 240, 400, 0, 30, 90, 210, 360, 600, 900, 0, 44, 132, 308, 528, 880, 1320, 1936, 0, 65, 195, 455, 780, 1300, 1950, 2860, 4225, 0, 91, 273, 637, 1092, 1820, 2730, 4004, 5915, 8281 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 rows, flattened)
EXAMPLE
Multiplication table begins:
* | 0 1 3 7 12 20 30 44 65
-----+-------------------------------------
0 | 0
1 | 0 1
3 | 0 3 9
7 | 0 7 21 49
12 | 0 12 36 84 144
20 | 0 20 60 140 240 400
30 | 0 30 90 210 360 600 900
44 | 0 44 132 308 528 880 1320 1936
65 | 0 65 195 455 780 1300 1950 2860 4225
CROSSREFS
Cf. A337656, A337657, A338031 (addition), A338034 (by antidiagonals).
Sequence in context: A324834 A019832 A244337 * A087566 A011337 A195456
KEYWORD
nonn,tabl
AUTHOR
Peter Kagey, Oct 07 2020
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)