login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119846 Distinct values in A119842, in order of appearance. 3
1, 0, 2, 6, 14, 22, 252, 5, 92, 17526, 324, 2916, 422, 9278038, 411126, 23694308, 2074, 8716, 1186593143406, 47570, 11395487424, 918166, 10754, 789632365568454684, 343234, 1164751580868, 42, 917581820575340, 1914786011328142, 58202, 17423496 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..39

MATHEMATICA

b[s_, t_] := b[s, t] = If[Length[s] < 1, 1, Sum[If[Mod[PrimeOmega[x], 2] == 1 - t && Length[Select[s, Mod[#, x] == 0 &]] == 1, b[s~Complement~{x}, 1 - t], 0], {x, s}]]; a[n_] := a[n] = Module[{l, m}, l = Sort[ FactorInteger[n], #1[[2]] > #2[[2]] &]; m = Product[Prime[i]^l[[i]][[2]], {i, 1, Length[l]}]; b[Divisors[m][[2 ;; -2]], Mod[PrimeOmega[m], 2]]]; A119846 = Reap[For[k = 1, k < 6000, k++, If[FreeQ[Array[a, k - 1], a[k]], Print[k, " ", a[k]]; Sow[a[k]]]]][[2, 1]] (* Jean-François Alcover, Mar 03 2016, after Alois P. Heinz *)

CROSSREFS

a(n) = A119842(A119845(n)).

Sequence in context: A160164 A074729 A099901 * A119844 A016060 A307643

Adjacent sequences:  A119843 A119844 A119845 * A119847 A119848 A119849

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 04 2006

EXTENSIONS

a(16)-a(31) from Alois P. Heinz, Feb 26 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 15:41 EDT 2019. Contains 328162 sequences. (Running on oeis4.)