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!)
 A252842 Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
 15395, 510488, 17431462, 598576435, 20541757032, 705111416679, 24203999575311, 830842687080423, 28520017219603855, 978996631680111286, 33605667415789875388, 1153569817068272958639, 39598180839349444564715 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A252844 LINKS R. H. Hardin, Table of n, a(n) for n = 1..120 EXAMPLE Some solutions for n=1 ..0..0..1..1....0..1..0..0....0..1..1..0....0..0..0..0....0..0..0..1 ..2..0..2..2....2..2..2..2....0..0..0..2....0..1..1..2....2..2..2..2 ..2..3..3..0....2..1..2..2....3..1..3..1....1..1..0..1....0..2..0..2 CROSSREFS Sequence in context: A345562 A345817 A252990 * A261724 A031637 A054838 Adjacent sequences: A252839 A252840 A252841 * A252843 A252844 A252845 KEYWORD nonn AUTHOR R. H. Hardin, Dec 22 2014 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 June 12 18:49 EDT 2024. Contains 373359 sequences. (Running on oeis4.)