A192607 Nonludic numbers: complement of A003309.

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 19, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 59, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 84, 85, 86, 87

Offset

1,1

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Formula

A192490(a(n)) = 0.

Mathematica

a3309[nmax_] := a3309[nmax] = Module[{t = Range[2, nmax], k, r = {1}}, While[Length[t] > 0, k = First[t]; AppendTo[r, k]; t = Drop[t, {1, -1, k}]]; r];
nmax = 1000;
Complement[Range[nmax], a3309[nmax]] (* Jean-François Alcover, Dec 10 2021, after Ray Chandler in A003309 *)

Prog

(Haskell)
a192607 n = a192607_list !! (n-1)
a192607_list = filter ((== 0) . a192490) [1..]

Crossrefs

Cf. A192505 (not ludic but prime), A192506 (neither ludic nor prime).

Sequence in context: A336371 A167376 A133576 * A088224 A002808 A018252

Adjacent sequences: A192604 A192605 A192606 * A192608 A192609 A192610

Keyword

nonn

Author

Reinhard Zumkeller, Jul 05 2011

Status

approved