OFFSET
1,3
FORMULA
EXAMPLE
Triangle begins:
n\k 1 2 3 4 5 6 7 8 9 10
----------------------------------
1: 1
2: 1 2
3: 2 2 3
4: 2 3 3 4
5: 4 4 4 4 5
6: 2 4 5 5 5 6
7: 6 6 6 6 6 6 7
8: 4 6 6 7 7 7 7 8
9: 6 6 8 8 8 8 8 8 9
10: 4 8 8 8 9 9 9 9 9 10
PROG
(PARI) T(n, k) = sum(m=1, n, gcd(m, n) <= k); \\ Michel Marcus, Jul 01 2021
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Pontus von Brömssen, Jul 01 2021
STATUS
approved