OFFSET
1,2
COMMENTS
This is the same triangle as A331781, except the initial row and column of 0's is missing.
EXAMPLE
Triangle begins:
1,
2, 3,
3, 5, 7,
4, 6, 9, 11,
5, 8, 12, 15, 19,
6, 9, 13, 16, 21, 23,
7, 11, 16, 20, 26, 29, 35,
8, 12, 18, 22, 29, 32, 39, 43,
9, 14, 20, 25, 33, 36, 44, 49, 55,
10, 15, 22, 27, 35, 38, 47, 52, 59, 63,
11, 17, 25, 31, 40, 44, 54, 60, 68, 73, 83,
12, 18, 26, 32, 42, 46, 57, 63, 71, 76, 87, 91,
...
MAPLE
V0 := proc(m, n) local a, i, j; a:=0;
for i from 1 to m do for j from 1 to n do
if igcd(i, j)=1 then a:=a+1; fi; od: od: a; end;
for m from 1 to 14 do lprint([seq(V0(m, n), n=1..m)]); od:
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Mar 24 2020
STATUS
approved