The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #12 Oct 09 2020 03:35:57
%S 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,
%T 30,44,31,23,19,19,23,31,44,65,45,33,27,24,27,33,45,65,91,66,47,37,32,
%U 32,37,47,66,91,107,92,68,51,42,40,42,51,68,92,107
%N Addition table of A337656, read by antidiagonals.
%H Peter Kagey, <a href="/A338032/b338032.txt">Table of n, a(n) for n = 1..10011</a> (first 141 antidiagonals, flattened)
%e Addition table begins:
%e + | 0 1 3 7 12 20 30 44 65
%e -----+-----------------------------
%e 0 | 0 1 3 7 12 20 30 44 65
%e 1 | 1 2 4 8 13 21 31 45 66
%e 3 | 3 4 6 10 15 23 33 47 68
%e 7 | 7 8 10 14 19 27 37 51 72
%e 12 | 12 13 15 19 24 32 42 56 77
%e 20 | 20 21 23 27 32 40 50 64 85
%e 30 | 30 31 33 37 42 50 60 74 95
%e 44 | 44 45 47 51 56 64 74 88 109
%e 65 | 65 66 68 72 77 85 95 109 130
%Y Cf. A337656, A337657, A338031 (by rows), A338034 (multiplication table).
%Y Cf. A337660, A337973, A338015.
%K nonn,tabl
%O 1,4
%A _Peter Kagey_, Oct 07 2020