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A271419
If n is a ludic number, a(n)=0; if n is not a ludic number, a(n) is the ludic number that rejects n from the ludic number sieve.
4
0, 0, 0, 2, 0, 2, 0, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 7, 2, 3, 2, 5, 2, 0, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 11, 2, 3, 2, 7, 2, 0, 2, 3, 2, 5, 2, 0, 2, 3, 2, 0, 2, 13, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 7
OFFSET
1,4
LINKS
FORMULA
a(n) = (1-A192490(n)) * A272565(n). - Antti Karttunen, Sep 11 2016
PROG
(Scheme) (define (A271419 n) (* (- 1 (A192490 n)) (A272565 n))) ;; Antti Karttunen, Sep 11 2016
CROSSREFS
Cf. A264940 (analogous version for lucky numbers).
Sequence in context: A294614 A347403 A063918 * A278922 A163169 A097974
KEYWORD
nonn
AUTHOR
Max Barrentine, Apr 07 2016
STATUS
approved