OFFSET
1,2
COMMENTS
LINKS
Alois P. Heinz, Rows n = 1..141, flattened
EXAMPLE
Triangle begins:
1,
3, 5,
6, 14, 23,
10, 18, 39, 55,
15, 33, 69, 105, 155,
21, 39, 75, 111, 191, 227,
28, 60, 117, 181, 296, 374, 521,
36, 68, 149, 213, 368, 446, 649, 777,
45, 95, 176, 276, 476, 554, 820, 1020, 1263,
55, 105, 216, 316, 516, 594, 930, 1130, 1463, 1663,
...
MAPLE
T:= (m, n)-> add(add(`if`(igcd(i, j)=1, i*j, 0), j=1..n), i=1..m):
seq(seq(T(m, n), n=1..m), m=1..12); # Alois P. Heinz, Mar 23 2020
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Mar 23 2020
STATUS
approved