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.

A300182 T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

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%I A300182 #4 Feb 27 2018 12:32:41
%S A300182 1,2,2,4,8,4,8,32,32,8,16,128,255,128,16,32,512,2033,2033,512,32,64,
%T A300182 2048,16208,32321,16208,2048,64,128,8192,129217,513832,513832,129217,
%U A300182 8192,128,256,32768,1030173,8168705,16288960,8168705,1030173,32768,256,512,131072
%N A300182 T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
%C A300182 Table starts
%C A300182 ...1......2........4...........8.............16...............32
%C A300182 ...2......8.......32.........128............512.............2048
%C A300182 ...4.....32......255........2033..........16208...........129217
%C A300182 ...8....128.....2033.......32321.........513832..........8168705
%C A300182 ..16....512....16208......513832.......16288960........516368256
%C A300182 ..32...2048...129217.....8168705......516368256......32640586945
%C A300182 ..64...8192..1030173...129863167....16369174784....2063278351093
%C A300182 .128..32768..8212978..2064518282...518912313824..130424025161538
%C A300182 .256.131072.65477359.32820974441.16449820393120.8244367994118153
%H A300182 R. H. Hardin, <a href="/A300182/b300182.txt">Table of n, a(n) for n = 1..364</a>
%F A300182 Empirical for column k:
%F A300182 k=1: a(n) = 2*a(n-1)
%F A300182 k=2: a(n) = 4*a(n-1)
%F A300182 k=3: a(n) = 7*a(n-1) +7*a(n-2) +6*a(n-3)
%F A300182 k=4: a(n) = 14*a(n-1) +27*a(n-2) +51*a(n-3) -10*a(n-4) -a(n-5) -10*a(n-6)
%F A300182 k=5: [order 9]
%F A300182 k=6: [order 15]
%F A300182 k=7: [order 36]
%e A300182 Some solutions for n=5 k=4
%e A300182 ..0..0..0..1. .0..0..0..1. .0..0..0..0. .0..0..0..1. .0..0..0..1
%e A300182 ..1..0..0..0. .0..0..1..0. .1..0..1..1. .0..1..1..1. .0..1..1..0
%e A300182 ..1..1..1..0. .1..0..0..1. .0..1..1..1. .0..1..0..0. .1..0..0..1
%e A300182 ..1..0..0..0. .1..0..0..1. .1..1..1..0. .1..0..0..0. .1..0..1..1
%e A300182 ..1..1..0..0. .0..0..0..0. .1..1..1..0. .1..0..0..0. .1..1..1..0
%Y A300182 Column 1 is A000079(n-1).
%Y A300182 Column 2 is A004171(n-1).
%K A300182 nonn,tabl
%O A300182 1,2
%A A300182 _R. H. Hardin_, Feb 27 2018