A236053 Number of (n+1)X(6+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock

46828, 128920, 297316, 741592, 1937236, 5604400, 14531028, 38664192, 103940452, 281356668, 753859448, 2024482660, 5476009648, 14709558024, 39423241044, 106472032536, 286341677420, 770669642520, 2071810312952, 5588216314764

Offset

1,1

Comments

Column 6 of A236055

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
..0..1..1..2..0..0..1....1..1..0..0..2..1..0....0..2..1..0..0..2..2
..1..1..1..1..1..1..2....1..2..1..1..1..2..1....0..1..2..1..1..1..2
..0..2..2..0..0..2..2....0..2..2..0..0..1..1....0..0..1..1..1..0..2

Crossrefs

Sequence in context: A171103 A066359 A234774 * A109030 A093223 A250688

Adjacent sequences: A236050 A236051 A236052 * A236054 A236055 A236056

Keyword

nonn

Author

R. H. Hardin, Jan 18 2014

Status

approved