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!)
 A210408 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order 1
 864, 80496, 7380816, 677993552, 62266883792, 5718722907600, 525218223843536, 48237041019306960, 4430181461077005264, 406876281233712454096, 37368290575302443698896, 3431974791902387709770704 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A210413 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 81*a(n-1) +1151*a(n-2) -13041*a(n-3) -117154*a(n-4) +478740*a(n-5) +445664*a(n-6) -2873152*a(n-7) +2422784*a(n-8) -196608*a(n-9) EXAMPLE Some solutions for n=4 ..0..0..0..0....0..0..0..1....0..0..0..0....0..0..1..0....0..0..1..1 ..1..2..1..3....1..2..1..2....1..2..3..2....1..2..1..2....1..2..2..3 ..1..0..0..1....2..0..1..3....2..0..2..0....0..0..1..0....3..0..3..0 ..0..2..3..2....1..3..0..0....3..0..1..2....3..2..1..2....0..1..3..1 ..1..1..0..3....1..0..2..3....3..2..3..1....0..0..3..1....3..2..1..0 CROSSREFS Sequence in context: A299220 A300034 A064321 * A299413 A300055 A082243 Adjacent sequences: A210405 A210406 A210407 * A210409 A210410 A210411 KEYWORD nonn AUTHOR R. H. Hardin Mar 21 2012 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 16 18:41 EDT 2024. Contains 373432 sequences. (Running on oeis4.)