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!)
A271420 Nonludicity of n. 4
0, 0, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 3, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 4, 1, 2, 1, 3, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 3, 1, 2, 1, 0, 1, 5, 1, 2, 1, 4, 1, 0, 1, 2, 1, 3, 1, 0, 1, 2, 1, 0, 1, 6, 1, 2, 1, 0, 1, 3, 1, 2, 1, 0, 1, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

COMMENTS

If n is ludic, a(n)=0; if n is nonludic, a(n) is the step at which n is rejected from the ludic number sieve.

LINKS

Max Barrentine, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = (1-A192490(n)) * A260738(n). - Antti Karttunen, Sep 11 2016

PROG

(Scheme) (define (A271419 n) (* (- 1 (A192490 n)) (A260738 n))) -- Antti Karttunen, Sep 11 2016

CROSSREFS

Cf. A003309, A192490, A192607, A255127, A271419.

Cf. A265859 (analogous version for lucky numbers).

Sequence in context: A334208 A159195 A265859 * A099313 A316491 A097468

Adjacent sequences:  A271417 A271418 A271419 * A271421 A271422 A271423

KEYWORD

nonn

AUTHOR

Max Barrentine, Apr 07 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 June 22 09:16 EDT 2021. Contains 345375 sequences. (Running on oeis4.)