1,2
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.
A093903(7) = 2, so a(2) = 7.
Cf. A093903.
Sequence in context: A126561 A144875 A049477 * A117237 A155697 A011477
Adjacent sequences: A113956 A113957 A113958 * A113960 A113961 A113962
nonn,bref,more
Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Nov 10 2005
