1,7

Here * stands for ordinary multiplication and X means carryless (GF(2)[X]) multiplication (A048720).

Table of n, a(n) for n=1..80.

Index entries for sequences defined by congruent products between domains N and GF(2)[X]

a(2n) = 2*a(n). Bisection A115870 gives the terms at odd positions. Differs from A115859 for the first time at n=23, where a(23)=15, while A115859(23)=19. Cf. A115857, A115861, A115871.

Sequence in context: A299163 A326128 A160086 * A115859 A241663 A344976

Adjacent sequences: A115866 A115867 A115868 * A115870 A115871 A115872

nonn

Antti Karttunen, Feb 07 2006

approved