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%I #8 Jul 31 2018 10:05:54
%S 0,12,52,24,76,20,68,16,60,136,56,128,232,124,80,164,280,160,72,152,
%T 264,148,64,140,248,388,244,132,236,372,540,368,228,168,284,432,612,
%U 428,276,156,268,412,588,408,260,144,252,392,564,768,560,384,240,376
%N Squares visited by a (2,2)-leaper on a spirally numbered board and moving to the lowest available unvisited square at each step.
%C Board is numbered with the square spiral:
%C .
%C 16--15--14--13--12
%C | |
%C 17 4---3---2 11 .
%C | | | |
%C 18 5 0---1 10 .
%C | | |
%C 19 6---7---8---9 .
%C |
%C 20--21--22--23--24--25
%H Daniël Karssen, <a href="/A317466/b317466.txt">Table of n, a(n) for n = 0..9999</a>
%H Daniël Karssen, <a href="/A317466/a317466.svg">Figure showing the first 11 steps of the sequence</a>
%H Daniël Karssen, <a href="/A317466/a317466_1.svg">Figure showing the first 9999 steps of the sequence</a>
%F a(n) = A317467(n+1) - 1.
%Y Cf. A317467, A317468.
%K nonn
%O 0,2
%A _Daniël Karssen_, Jul 29 2018
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