The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A252773 Number of (n+2)X(3+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 1
 4687, 23114, 129870, 797340, 5171516, 34241905, 231889793, 1600079329, 11101235991, 77978854894, 553317363901, 3930371657015, 28133917383382, 202467448289241, 1456058664605429, 10522550922399483, 76243229044824767 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A252777 LINKS R. H. Hardin, Table of n, a(n) for n = 1..78 EXAMPLE Some solutions for n=3 ..0..1..1..0..1....0..1..0..1..1....0..0..1..0..1....0..1..0..0..2 ..0..2..2..1..1....0..2..2..0..2....0..0..2..2..1....0..3..3..0..3 ..2..1..2..1..2....1..1..2..1..1....3..2..2..0..2....3..1..3..3..2 ..2..2..0..0..1....0..1..0..0..2....0..2..0..2..2....0..1..0..0..2 ..0..2..0..0..2....1..2..2..1..2....3..3..2..2..3....3..0..3..0..3 CROSSREFS Sequence in context: A218096 A293583 A263066 * A204073 A256808 A114542 Adjacent sequences:  A252770 A252771 A252772 * A252774 A252775 A252776 KEYWORD nonn AUTHOR R. H. Hardin, Dec 21 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 25 18:25 EST 2022. Contains 350572 sequences. (Running on oeis4.)