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.

A206618 Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having no more than two equal edges, and new values 0..2 introduced in row major order.

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%I A206618 #7 May 24 2021 15:26:11
%S A206618 27895,4099700,752689692,135010973857,24021101375251,4289914143971114,
%T A206618 765786718381692875,136684817422844172008,24398259565684468482150,
%U A206618 4355036966257280535391081,777364691410538473251350415
%N A206618 Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having no more than two equal edges, and new values 0..2 introduced in row major order.
%C A206618 Column 5 of A206621.
%H A206618 R. H. Hardin, <a href="/A206618/b206618.txt">Table of n, a(n) for n = 1..210</a>
%e A206618 Some solutions for n=4
%e A206618 ..0..0..1..0..1..0....0..1..1..2..0..1....0..0..0..0..1..1....0..0..0..1..2..1
%e A206618 ..0..1..0..0..0..2....2..2..0..1..1..2....1..2..1..2..2..0....2..0..1..0..2..2
%e A206618 ..2..0..2..1..2..0....2..1..2..2..0..0....0..0..0..2..0..2....0..1..2..0..1..0
%e A206618 ..0..1..2..0..1..1....1..0..2..0..1..1....2..0..1..0..1..0....2..2..0..1..2..2
%e A206618 ..2..2..1..0..2..0....2..2..1..2..0..1....0..1..2..0..0..2....2..1..2..1..2..0
%Y A206618 Cf. A206621.
%K A206618 nonn
%O A206618 1,1
%A A206618 _R. H. Hardin_ Feb 10 2012