login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A066682 Indices of badly sieved numbers: a(n) = k if n = A066680(k), otherwise 0. 2
0, 1, 2, 0, 3, 0, 4, 5, 0, 0, 6, 7, 8, 0, 0, 0, 9, 10, 11, 0, 0, 0, 12, 0, 0, 0, 13, 0, 14, 15, 16, 0, 0, 0, 0, 0, 17, 0, 0, 0, 18, 0, 19, 0, 20, 0, 21, 0, 0, 22, 0, 0, 23, 0, 0, 0, 0, 0, 24, 0, 25, 0, 26, 0, 0, 0, 27, 0, 0, 28, 29, 0, 30, 0, 31, 0, 0, 0, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..79.

FORMULA

a(n) = A099104(n)*A066683(n).

CROSSREFS

Cf. A066680, A049084.

Sequence in context: A318518 A008808 A008820 * A239968 A320311 A240140

Adjacent sequences:  A066679 A066680 A066681 * A066683 A066684 A066685

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 31 2001

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 September 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)