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 A205364 Number of (n+1)X3 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock the same 1
 1976, 31848, 516364, 8539884, 143559116, 2448719840, 42290474776, 737993545372, 12988141017436, 230145818607660, 4100220870678448, 73358893720135520, 1316830676835150404, 23698058348765945172, 427312014589126089788 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A205370 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 39*a(n-1) -494*a(n-2) +2341*a(n-3) -4372*a(n-4) -2243*a(n-5) +27629*a(n-6) -71364*a(n-7) +132199*a(n-8) -205216*a(n-9) +254720*a(n-10) -262592*a(n-11) +241702*a(n-12) -187260*a(n-13) +118740*a(n-14) -66636*a(n-15) +30712*a(n-16) -10072*a(n-17) +2648*a(n-18) -432*a(n-19) -80*a(n-20) +32*a(n-21) EXAMPLE Some solutions for n=4 ..2..1..1....1..0..0....1..1..3....1..2..0....1..3..0....0..1..0....2..3..1 ..1..0..3....0..0..3....3..3..3....2..0..1....1..0..1....2..0..1....1..2..0 ..2..1..0....1..2..2....0..0..2....0..3..3....2..1..2....2..1..3....1..0..1 ..0..2..1....1..1..1....1..1..1....2..1..0....1..3..3....0..2..1....0..1..3 ..1..3..2....3..3..1....1..0..0....1..2..1....0..1..0....3..3..2....0..2..1 CROSSREFS Sequence in context: A061998 A205653 A206182 * A210160 A234179 A108510 Adjacent sequences: A205361 A205362 A205363 * A205365 A205366 A205367 KEYWORD nonn AUTHOR R. H. Hardin Jan 26 2012 STATUS approved

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Last modified March 31 05:47 EDT 2023. Contains 361634 sequences. (Running on oeis4.)