The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A211172 A Sudoku torus. 1
 6, 5, 7, 3, 4, 2, 1, 9, 8, 9, 8, 1, 5, 6, 7, 4, 3, 2, 3, 2, 4, 8, 9, 1, 6, 5, 7, 5, 7, 6, 2, 3, 4, 9, 8, 1, 8, 1, 9, 7, 5, 6, 3, 2, 4, 2, 4, 3, 1, 8, 9, 5, 7, 6, 7, 6, 5, 4, 2, 3, 8, 1, 9, 1, 9, 8, 6, 7, 5, 2, 4, 3, 4, 3, 2, 9, 1, 8, 7, 6, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence is a listing for a Sudoku grid: 6 5 7 3 4 2 1 9 8 9 8 1 5 6 7 4 3 2 3 2 4 8 9 1 6 5 7 5 7 6 2 3 4 9 8 1 8 1 9 7 5 6 3 2 4 2 4 3 1 8 9 5 7 6 7 6 5 4 2 3 8 1 9 1 9 8 6 7 5 2 4 3 4 3 2 9 1 8 7 6 5 No two diagonally adjacent elements are the same. If the grid is rolled into a cylinder either way, this is still true making a 'Sudoku torus'. This extra information can be used to construct puzzles that use 'no diagonal' logic. The two lexicographical Sudoki in the cross-references have one internal diagonal each and several external diagonals. LINKS Table of n, a(n) for n=1..81. Mathworld, Sudoku Wikipedia, Sudoku EXAMPLE If a puzzle has say: |x 5| ___|x then x cannot be 5. CROSSREFS Cf. A107739. Cf. A114288, A112454 (lexicographic grids). Sequence in context: A195786 A201330 A089826 * A152149 A338287 A365927 Adjacent sequences: A211169 A211170 A211171 * A211173 A211174 A211175 KEYWORD nonn,fini,full,tabf AUTHOR Jon Perry, Jan 31 2013 STATUS approved

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

Last modified May 18 15:50 EDT 2024. Contains 372664 sequences. (Running on oeis4.)