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 A115860 gives the terms at odd positions. Differs from A115869 for the first time at n=23, where a(23)=19, while A115869(23)=15. Cf. A115857, A115861, A115871.

Sequence in context: A299163 A160086 A115869 * A241663 A129170 A209436

Adjacent sequences: A115856 A115857 A115858 * A115860 A115861 A115862

nonn

Antti Karttunen, Feb 07 2006

approved