A235036 Nonprime numbers which are factored to the same set of primes in Z as to the irreducible polynomials in GF(2)[X].

1, 4, 6, 8, 12, 14, 16, 22, 24, 26, 28, 32, 38, 44, 48, 52, 56, 62, 64, 74, 76, 82, 88, 94, 96, 104, 111, 112, 118, 122, 123, 124, 128, 134, 146, 148, 152, 164, 176, 188, 192, 194, 206, 208, 218, 219, 222, 224, 236, 244, 246, 248, 256, 262, 268, 274, 292, 296, 304

Offset

0,2

Comments

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

Links

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

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

Prog

(Scheme, with Antti Karttunen's IntSeq-library)
(define A235036 (MATCHING-POS 0 1 (lambda (n) (and (not (prime? n)) (equal? (ifactor n) (GF2Xfactor n))))))

Crossrefs

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: A090697 A359675 A225508 * A107303 A028876 A271346

Adjacent sequences: A235033 A235034 A235035 * A235037 A235038 A235039

Keyword

nonn

Author

Antti Karttunen, Jan 02 2014

Status

approved