A027443 For n != 1 mod 3, we can write 3/(2n+1) = 1/a + 1/b + 1/c with a>b>c>0, a,b,c distinct and odd; sequence gives smallest such a, or 1 if n = 1 mod 3.

1, 15, 35, 1, 165, 91, 1, 153, 247, 1, 207, 75, 1, 435, 651, 1, 63, 185, 1, 615, 1247, 1, 2961, 245, 1, 371, 99, 1, 1239, 1891, 1, 105, 3015, 1, 1917, 2701, 1, 99, 4187, 1, 9213, 187, 1, 4005, 143, 1, 285, 3395, 1, 1313, 4017, 1, 15301, 5995, 1, 4407, 345

Offset

1,2

Links

Table of n, a(n) for n=1..57.

Example

1/15+1/5+1/3=3/5; 1/35+1/15+1/3=3/7; 1/165+1/15+1/5=3/11; 1/91+1/13+1/7=3/13

Crossrefs

Cf. A027442.

Sequence in context: A345733 A297729 A156662 * A205148 A253055 A338063

Adjacent sequences: A027440 A027441 A027442 * A027444 A027445 A027446

Keyword

nonn

Author

N. J. A. Sloane and R. H. Hardin

Status

approved