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A337974 Triangular array read by rows: T(n,k) = A337946(n) * A337946(k), for 1 <= k <= n. 5
1, 3, 9, 7, 21, 49, 12, 36, 84, 144, 22, 66, 154, 264, 484, 30, 90, 210, 360, 660, 900, 47, 141, 329, 564, 1034, 1410, 2209, 61, 183, 427, 732, 1342, 1830, 2867, 3721, 85, 255, 595, 1020, 1870, 2550, 3995, 5185, 7225, 113, 339, 791, 1356, 2486, 3390, 5311, 6893, 9605, 12769 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This sequence, A337947, and A337972 partition the positive integers.
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 rows, flattened)
EXAMPLE
Multiplication table for A337946 begins:
* | 1 3 7 12 22 30 47 61 85
-----+-----------------------------------------
1 | 1
3 | 3 9
7 | 7 21 49
12 | 12 36 84 144
22 | 22 66 154 264 484
30 | 30 90 210 360 660 900
47 | 47 141 329 564 1034 1410 2209
61 | 61 183 427 732 1342 1830 2867 3721
85 | 85 255 595 1020 1870 2550 3995 5185 7225
CROSSREFS
Cf. A337972 (addition table), A337975 (read by antidiagonals).
Sequence in context: A178414 A220654 A302158 * A137299 A329238 A001226
KEYWORD
nonn,tabl
AUTHOR
Peter Kagey, Oct 05 2020
STATUS
approved

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Last modified June 21 19:43 EDT 2024. Contains 373558 sequences. (Running on oeis4.)