cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A208771 Number of n-bead necklaces labeled with numbers 1..n not allowing reversal, with no adjacent beads differing by more than 1.

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%I A208771 #10 Mar 19 2017 01:12:40
%S A208771 1,3,7,18,41,117,299,861,2413,6955,19943,57974,168013,489789,1428611,
%T A208771 4177232,12226997,35847123,105200351,309086838,908931221,2675276801,
%U A208771 7880255915,23228969891,68518137777,202231890207,597228362551,1764663912122
%N A208771 Number of n-bead necklaces labeled with numbers 1..n not allowing reversal, with no adjacent beads differing by more than 1.
%H A208771 Andrew Howroyd, <a href="/A208771/b208771.txt">Table of n, a(n) for n = 1..100</a>
%e A208771 All solutions for n=3:
%e A208771 ..2....3....1....1....2....1....2
%e A208771 ..3....3....2....1....2....1....2
%e A208771 ..3....3....2....2....3....1....2
%Y A208771 Diagonal of A208777.
%K A208771 nonn
%O A208771 1,2
%A A208771 _R. H. Hardin_, Mar 01 2012
%E A208771 a(19)-a(28) from _Andrew Howroyd_, Mar 18 2017