This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A317105 Squares visited by a (1,3)-leaper on a spirally numbered board and moving to the lowest available unvisited square at each step. 10
 0, 26, 12, 4, 10, 6, 14, 8, 18, 2, 16, 32, 54, 84, 24, 28, 50, 46, 20, 38, 62, 94, 56, 86, 124, 48, 22, 40, 66, 34, 58, 88, 52, 30, 60, 36, 68, 42, 76, 112, 70, 44, 72, 106, 148, 100, 140, 188, 134, 180, 128, 90, 136, 96, 64, 104, 146, 98, 138, 92, 130, 176, 230 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Board is numbered with the square spiral: .   16--15--14--13--12    |               |   17   4---3---2  11   .    |   |       |   |   18   5   0---1  10   .    |   |           |   19   6---7---8---9   .    |   20--21--22--23--24--25 . The sequence is finite: at step 3722, square 7080 is visited, after which there are no unvisited squares within one move. LINKS Daniël Karssen, Table of n, a(n) for n = 0..3722 Daniël Karssen, Figure showing the first 46 steps of the sequence Daniël Karssen, Figure showing the complete sequence FORMULA a(n) = A317106(n+1) - 1. CROSSREFS Cf. A317106, A317107. Sequence in context: A040654 A034057 A070715 * A033346 A158605 A040653 Adjacent sequences:  A317102 A317103 A317104 * A317106 A317107 A317108 KEYWORD nonn,fini,full AUTHOR Daniël Karssen, Jul 24 2018, following a suggestion from N. J. A. Sloane, Jul 15 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 24 05:39 EDT 2019. Contains 324318 sequences. (Running on oeis4.)