A260722 Difference between n-th odd Ludic and n-th Lucky number: a(1) = 0; for n > 1: a(n) = A003309(n+1) - A000959(n).

0, 0, -2, -2, -2, -2, -4, -2, -6, -4, 0, -2, -6, -4, -10, -6, -2, -2, 2, 4, 2, -2, -2, 2, 4, 4, -6, -2, -2, 8, 8, 6, 2, 10, 6, 8, -8, 0, 14, 10, 16, 12, 8, 10, 4, 4, 10, 16, 6, 16, 16, 14, 18, 22, 24, 32, 28, 30, 22, 32, 32, 30, 38, 34, 32, 36, 40, 30, 28, 28, 32, 24, 22, 24, 36, 38, 42, 30, 30, 22, 26, 26, 30, 38, 40, 30, 36, 46, 48, 46, 56, 54, 54, 54, 40, 46

Offset

1,3

Comments

Equally: for n >= 2, the difference between (n+1)-th Ludic and n-th Lucky number.

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Index entries for sequences generated by sieves

Formula

a(1) = 0; for n > 1: a(n) = A003309(n+1) - A000959(n).

Other identities. For all n >= 2:

a(n) = A256486(n) + A260723(n).

a(n) = A256486(n+1) + A031883(n).

Prog

(Scheme) (define (A260722 n) (if (= 1 n) 0 (- (A003309 (+ 1 n)) (A000959 n))))

Crossrefs

Cf. A000959, A003309, A031883, A260721 (same terms divided by two), A260723, A256486, A256487.

Cf. also permutations A260435, A260436, A260741, A260742.

Sequence in context: A067025 A049047 A037088 * A153436 A354359 A367130

Adjacent sequences: A260719 A260720 A260721 * A260723 A260724 A260725

Keyword

sign

Author

Antti Karttunen, Aug 06 2015

Status

approved