1,1

Antti Karttunen, Table of n, a(n) for n = 1..2048

a(n) = A257244(2n - 1).

a(n) = A006530(A256393(2n - 1)). [Equally, the largest prime factor of A256393(2n-1).]

Other identities and observations:

For all n >= 1, a(n) >= A257246(n).

(Scheme, alternative definitions)

(define (A257245 n) (A257244 (+ n n -1)))

(define (A257245 n) (A006530 (A256393 (+ n n -1))))

Cf. A006530, A256393, A257244.

Cf. also A257246 (the other bisection), A257247 (gives the positions where both bisections have the same value).

Sequence in context: A046886 A257246 A056206 * A329245 A155047 A029088

Adjacent sequences: A257242 A257243 A257244 * A257246 A257247 A257248

nonn

Antti Karttunen, Apr 19 2015

approved