A283993 a(n) = number of reducible Stern polynomials in range B(1,x) .. B(n,x). (Polynomial B_1(x) = 1 is not included in the count).

0, 0, 0, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 7, 8, 9, 9, 10, 10, 11, 12, 13, 13, 14, 14, 15, 16, 17, 17, 18, 18, 19, 20, 21, 22, 23, 23, 24, 25, 26, 26, 27, 27, 28, 29, 30, 30, 31, 32, 33, 34, 35, 35, 36, 36, 37, 38, 39, 39, 40, 40, 41, 42, 43, 43, 44, 44, 45, 46, 47, 47, 48, 48, 49, 50, 51, 51, 52, 52, 53, 54, 55, 55, 56, 57, 58, 59, 60, 60, 61, 61, 62, 63, 64, 64

Offset

1,6

Links

Antti Karttunen, Table of n, a(n) for n = 1..10001

Formula

a(n) = (n-1) - A283992(n).

Prog

(Scheme) (define (A283993 n) (- n (A283992 n) 1))

Crossrefs

Cf. A125184, A260443, A283992, A283994.

Differs from A255572 for the first time at n=65, where a(65) = 43, while A255572(65) = 44.

Sequence in context: A099249 A050296 A057062 * A255572 A065855 A236863

Adjacent sequences: A283990 A283991 A283992 * A283994 A283995 A283996

Keyword

nonn

Author

Antti Karttunen, Mar 20 2017

Status

approved