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A338032
Addition table of A337656, read by antidiagonals.
4
0, 1, 1, 3, 2, 3, 7, 4, 4, 7, 12, 8, 6, 8, 12, 20, 13, 10, 10, 13, 20, 30, 21, 15, 14, 15, 21, 30, 44, 31, 23, 19, 19, 23, 31, 44, 65, 45, 33, 27, 24, 27, 33, 45, 65, 91, 66, 47, 37, 32, 32, 37, 47, 66, 91, 107, 92, 68, 51, 42, 40, 42, 51, 68, 92, 107
OFFSET
1,4
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 antidiagonals, flattened)
EXAMPLE
Addition table begins:
+ | 0 1 3 7 12 20 30 44 65
-----+-----------------------------
0 | 0 1 3 7 12 20 30 44 65
1 | 1 2 4 8 13 21 31 45 66
3 | 3 4 6 10 15 23 33 47 68
7 | 7 8 10 14 19 27 37 51 72
12 | 12 13 15 19 24 32 42 56 77
20 | 20 21 23 27 32 40 50 64 85
30 | 30 31 33 37 42 50 60 74 95
44 | 44 45 47 51 56 64 74 88 109
65 | 65 66 68 72 77 85 95 109 130
CROSSREFS
Cf. A337656, A337657, A338031 (by rows), A338034 (multiplication table).
Sequence in context: A084388 A368155 A136389 * A350770 A332057 A275330
KEYWORD
nonn,tabl
AUTHOR
Peter Kagey, Oct 07 2020
STATUS
approved