A236016 Number of (n+1) X (6+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2 X 2 subblock.

70688, 140716, 313060, 771564, 2004428, 5805712, 15065380, 40075220, 108049932, 292941484, 783428520, 2102168788, 5695213348, 15293178312, 41005903868, 110638020236, 297949963720, 801215508408, 2155569514552, 5809862454936

Offset

1,1

Comments

Column 6 of A236018.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 4*a(n-2) +24*a(n-4) +3*a(n-5) +4*a(n-6) +123*a(n-7) -513*a(n-9) +393*a(n-10) -1940*a(n-11) -6553*a(n-12) -2329*a(n-13) -21264*a(n-14) -12956*a(n-15) +6136*a(n-16) -13278*a(n-17) -21758*a(n-18) +155426*a(n-19) -77448*a(n-20) +448608*a(n-21) +574916*a(n-22) +20728*a(n-23) +1436288*a(n-24) +23184*a(n-25) +245120*a(n-26) +187872*a(n-27) +671424*a(n-28) +16128*a(n-29) +424000*a(n-30) -66048*a(n-31) +82944*a(n-32) +101376*a(n-34) for n>40.

Example

Some solutions for n=2
..1..2..0..1..1..0..2....1..2..1..1..1..2..0....1..0..0..2..2..0..1
..2..1..1..1..1..0..0....2..1..0..1..1..1..0....2..1..1..1..1..1..0
..1..0..0..2..2..0..0....2..0..1..2..2..0..1....2..2..0..0..2..2..2

Crossrefs

Cf. A236018.

Sequence in context: A243135 A253738 A252104 * A204482 A186821 A252728

Adjacent sequences: A236013 A236014 A236015 * A236017 A236018 A236019

Keyword

nonn

Author

R. H. Hardin, Jan 18 2014

Status

approved