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A337659
Triangular array read by rows: T(n,k) = A337655(n) + A337655(k), for 1 <= k <= n.
8
2, 3, 4, 6, 7, 10, 8, 9, 12, 14, 16, 17, 20, 22, 30, 23, 24, 27, 29, 37, 44, 32, 33, 36, 38, 46, 53, 62, 51, 52, 55, 57, 65, 72, 81, 100, 69, 70, 73, 75, 83, 90, 99, 118, 136, 91, 92, 95, 97, 105, 112, 121, 140, 158, 180, 102, 103, 106, 108, 116, 123, 132, 151, 169, 191, 202
OFFSET
1,1
COMMENTS
This is the lower triangular part of the addition table from A337655, read by rows.
Sequences A337659, A337660, A337661, A337662 arise from the addition and multiplication tables in A337655, each one described in two ways. Perhaps someone could help by creating the analogous sets of four sequences for the addition and multiplication tables in the closely related sequences A337656 and A337946.
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 rows, flattened)
EXAMPLE
The addition table from A337655 begins:
2, 3, 6, 8, 16, 23, 32, 51, 69, 91, ...
3, 4, 7, 9, 17, 24, 33, 52, 70, 92, ...
6, 7, 10, 12, 20, 27, 36, 55, 73, 95, ...
8, 9, 12, 14, 22, 29, 38, 57, 75, 97, ...
16, 17, 20, 22, 30, 37, 46, 65, 83, 105, ...
23, 24, 27, 29, 37, 44, 53, 72, 90, 112, ...
32, 33, 36, 38, 46, 53, 62, 81, 99, 121, ...
51, 52, 55, 57, 65, 72, 81, 100, 118, 140, ...
69, 70, 73, 75, 83, 90, 99, 118, 136, 158, ...
91, 92, 95, 97, 105, 112, 121, 140, 158, 180, ...
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Oct 03 2020
STATUS
approved