0,2

Note: Start indexing from n=1 if you want just composite numbers. a(0)=1 is the only nonprime, noncomposite in this list.

Antti Karttunen, Table of n, a(n) for n = 0..1890

Index entries for sequences operating on (or containing) GF(2)[X]-polynomials

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

(define A235036 (MATCHING-POS 0 1 (lambda (n) (and (not (prime? n)) (equal? (ifactor n) (GF2Xfactor n))))))

These are nonprime (and nonzero) numbers in A235032. Also a subsequence of A235045 and (apart from 1) of A091212. A235039 gives the odd terms.

Sequence in context: A047407 A090697 A225508 * A107303 A028876 A271346

Adjacent sequences: A235033 A235034 A235035 * A235037 A235038 A235039

nonn

Antti Karttunen, Jan 02 2014

approved