OFFSET
1,2
COMMENTS
A103683 is injective.
Inverse of A103683.
Conjecture: a(42 + 6*k) = 0. This would follow from the conjecture that for n >= 67, A103683(n) is divisible by 3 iff n == 3 mod 4 and by 2 iff n == 2 mod 4. - Robert Israel, May 12 2015
The conjecture is false; a(42) = 102982. - Rémy Sigrist, Jan 05 2022
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000
Rémy Sigrist, C program for A105214
EXAMPLE
a(6) = 46 because A103683(46) = 6.
MATHEMATICA
f[s_] := Block[{k = 1, l = Take[s, -3]}, While[ Union[ GCD[k, l]] != {1} || MemberQ[s, k], k++]; Append[s, k]]; Take[Ordering@ Nest[f, {1, 2, 3}, 200], 41] (* Robert G. Wilson v, Jun 26 2011 *)
PROG
(C) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet and Robert G. Wilson v, Apr 13 2005
EXTENSIONS
More terms from Rémy Sigrist, Jan 05 2022
STATUS
approved