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 A237219 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock equal 1
 256, 1416, 8238, 50998, 324760, 2135910, 14272968, 97077068, 665750830, 4607875290, 32019860020, 223534827494, 1563373657868, 10959098528264, 76884218567414, 539997393805814, 3793994100382864, 26671435372462390 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A237225 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 16*a(n-1) -8*a(n-2) -1098*a(n-3) +4586*a(n-4) +24400*a(n-5) -179753*a(n-6) -114082*a(n-7) +2989632*a(n-8) -3122880*a(n-9) -24773900*a(n-10) +51198752*a(n-11) +103774016*a(n-12) -332116608*a(n-13) -189089472*a(n-14) +1143792096*a(n-15) -35184544*a(n-16) -2249166912*a(n-17) +694237760*a(n-18) +2547612544*a(n-19) -1068840448*a(n-20) -1598213632*a(n-21) +687111168*a(n-22) +500299776*a(n-23) -200097792*a(n-24) -60039168*a(n-25) +21823488*a(n-26) EXAMPLE Some solutions for n=4 ..2..0....1..2....1..2....3..1....0..3....0..3....2..3....2..2....3..0....3..2 ..2..2....1..0....0..1....0..1....0..1....2..0....3..3....2..1....1..0....3..0 ..2..1....3..2....3..0....1..3....3..2....1..0....2..3....1..1....2..3....0..1 ..2..2....1..0....2..1....1..1....3..2....0..0....2..0....3..2....1..0....3..0 ..3..3....2..1....0..1....3..1....2..3....2..3....2..3....1..0....2..1....2..1 CROSSREFS Sequence in context: A187964 A187956 A237225 * A237951 A237946 A237488 Adjacent sequences: A237216 A237217 A237218 * A237220 A237221 A237222 KEYWORD nonn AUTHOR R. H. Hardin, Feb 05 2014 STATUS approved

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Last modified April 1 12:16 EDT 2023. Contains 361691 sequences. (Running on oeis4.)