OFFSET
1,1
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..100
FORMULA
a(n) = (1/n) * Sum_{d | n} totient(n/d) * A198636(d). - Andrew Howroyd, Mar 18 2017
EXAMPLE
All solutions for n=3:
..3....2....1....3....5....2....4....1....2....3....4....4....1....2....1....3
..4....3....2....4....6....3....5....2....3....4....5....5....2....3....2....4
..5....4....3....5....5....2....6....1....4....3....4....4....3....2....1....3
..4....3....4....6....6....3....5....2....5....4....5....5....2....3....2....4
..5....4....3....5....5....2....6....1....4....5....4....6....3....4....3....3
..4....3....2....4....6....3....5....2....3....4....5....5....2....3....2....4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2012
EXTENSIONS
a(17)-a(28) from Andrew Howroyd, Mar 18 2017
STATUS
approved