1,1

Terms of A236842 (A234742) that are divisible by at least one of the primes in A091209.

a(4)=75, is the first term here which does not occur in A236834. On the other hand, A236834(5)=91 is the first of its terms that does not occur here.

Antti Karttunen, Table of n, a(n) for n = 1..13105

(Scheme, with Antti Karttunen's IntSeq-library)

(define A236849 (COMPOSE A236842 (MATCHING-POS 1 1 (lambda (n) (any (lambda (p) (= 1 (A091247 p))) (ifactor (A236842 n)))))))

Setwise difference A236848 \ A236844, and also A236842 \ A236860.

Cf. A091209, A234742, A236842, A236848, A236834.

Sequence in context: A076637 A040600 A277190 * A236834 A033902 A009177

Adjacent sequences: A236846 A236847 A236848 * A236850 A236851 A236852

nonn

Antti Karttunen, Jan 31 2014

approved