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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A240148 Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4 1
 3, 5, 11, 25, 62, 144, 329, 775, 1781, 4150, 9625, 22243, 51656, 119768, 277454, 643440, 1492066, 3458520, 8019402, 18594916, 43110992, 99960080, 231775985, 537393625, 1246028348, 2889126804, 6698837457, 15532273640, 36014074118 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A240153 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-2) +14*a(n-3) +5*a(n-4) -28*a(n-5) -89*a(n-6) -50*a(n-7) +93*a(n-8) +303*a(n-9) +214*a(n-10) -113*a(n-11) -561*a(n-12) -468*a(n-13) -47*a(n-14) +584*a(n-15) +499*a(n-16) +142*a(n-17) -359*a(n-18) -96*a(n-19) -23*a(n-20) +128*a(n-21) -102*a(n-22) -99*a(n-23) -119*a(n-24) +32*a(n-25) +82*a(n-26) +113*a(n-27) +50*a(n-28) -7*a(n-29) -42*a(n-30) -20*a(n-31) +a(n-32) +4*a(n-33) +a(n-34) for n>36 EXAMPLE Some solutions for n=4 ..3..3....3..3....3..2....3..2....2..2....3..3....3..3....3..3....2..2....2..2 ..2..2....2..1....3..2....3..1....0..2....2..1....2..1....2..1....0..2....0..2 ..3..1....0..2....0..3....2..2....0..3....3..2....3..2....3..2....0..3....0..2 ..2..1....3..2....0..3....3..1....2..2....0..2....3..2....3..1....0..3....0..2 CROSSREFS Sequence in context: A018008 A104545 A027050 * A109249 A196423 A320177 Adjacent sequences: A240145 A240146 A240147 * A240149 A240150 A240151 KEYWORD nonn AUTHOR R. H. Hardin, Apr 02 2014 STATUS approved

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

Last modified September 19 16:10 EDT 2024. Contains 376013 sequences. (Running on oeis4.)