A292248 a(n) = A292245(A048673(n)).

1, 2, 2, 4, 5, 4, 4, 8, 9, 10, 11, 8, 8, 8, 8, 16, 17, 18, 18, 20, 21, 22, 22, 16, 17, 16, 16, 16, 17, 16, 17, 32, 32, 34, 34, 36, 36, 36, 37, 40, 41, 42, 42, 44, 45, 44, 44, 32, 33, 34, 34, 32, 32, 32, 33, 32, 33, 34, 35, 32, 33, 34, 34, 64, 64, 64, 64, 68, 69, 68, 69, 72, 73, 72, 72, 72, 72, 74, 74, 80, 81, 82, 82, 84, 85, 84, 84, 88, 89, 90, 91

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..8192

Formula

a(n) = A292245(A048673(n)).

a(n) + A292247(n) = n.

Mathematica

f[n_] := Times @@ Power[If[# == 1, 1, NextPrime[#, -1]] & /@ First@ #, Last@ #] &@ Transpose@ FactorInteger[2 n - 1]; g[n_] := (Times @@ Power[If[# == 1, 1, NextPrime@ #] & /@ First@ #, Last@ #] + 1)/2 &@ Transpose@ FactorInteger@ n; Map[FromDigits[#, 2] &[IntegerDigits[#, 3] /. 2 -> 0] &, Map[a, Array[g, 91]]] (* Michael De Vlieger, Sep 16 2017 *)

Crossrefs

Cf. A048673, A292244, A292247.

Sequence in context: A187214 A179821 A292272 * A210762 A302985 A302983

Adjacent sequences: A292245 A292246 A292247 * A292249 A292250 A292251

Keyword

nonn

Author

Antti Karttunen, Sep 16 2017

Status

approved