OFFSET
1,2
COMMENTS
If A065157(u, v) = n then u is a divisor of n.
LINKS
FORMULA
EXAMPLE
For n = 10:
- the table A065157(u, v) begins (with terms > 10 replaced by dots):
u\v| 1 2 3 4 5 6 7 8 9 10
---+----------------------------------
1| 1 2 3 4 5 6 7 8 9 10
2| 2 4 10 8 . . . . . .
3| 3 6 . . . . . . . .
4| 4 8 . . . . . . . .
5| 5 10 . . . . . . . .
6| 6 . . . . . . . . .
7| 7 . . . . . . . . .
8| 8 . . . . . . . . .
9| 9 . . . . . . . . .
10| 10 . . . . . . . . .
- the value 10 appears 4 times,
- so a(10) = 4.
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Jun 27 2021
STATUS
approved