A309734 Inverse permutation to A309668.

1, 2, 5, 4, 3, 10, 9, 8, 7, 6, 11, 20, 19, 18, 17, 16, 15, 14, 13, 25, 12, 23, 22, 21, 40, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 53, 26, 50, 49, 24, 47, 46, 45, 44, 43, 42, 41, 81, 79, 39, 76, 75, 74, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61

Offset: 1

Author

Rémy Sigrist, Aug 14 2019

Keywords

• nonn
• base
• look

Examples

			A309668(5) = 3, hence a(3) = 5.
		

Links

• Robert Israel, Table of n, a(n) for n = 1..10000
• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Cf. A309668.

Programs

Maple

S:= [$1..100]:
for n from 1 while S <> [] do
  for i from 1 to nops(S) do
    s:= S[i];
    if ilog2(n*s+n-1) > ilog2(n*s-1) then
      A[s]:= n;
      S:= subsop(i=NULL,S);
      break
    fi
od od:
seq(A[i],i=1..100); # Robert Israel, Apr 23 2020