OFFSET
1,2
COMMENTS
a(n) is the index k such that A093903(k) = n.
5 and 7 do not appear up to position 100000, 6 appears at position 3 and 8 to 21 appear resp. at 673, 10, 25493, 4, 21, 50, 121, 6, 19, 48, 17, 8, 119, 10132.
EXAMPLE
A093903(7) = 2, so a(2) = 7.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Klaus Brockhaus, Nov 10 2005
STATUS
approved