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A165383 Number of slanted nX6 (i=1..n)X(j=i..6+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value 0
241, 5472, 37784, 174197, 598332, 1700146, 4185118, 9267244, 18840617, 35800784, 64279915, 110110272, 181122449, 287758922, 443428845, 665278308, 974595065, 1397742124 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..19.

EXAMPLE

One solution for n=16

...1.1.2.2.2.2..............................

.....1.1.2.2.2.2............................

.......1.1.1.1.2.2..........................

.........1.1.2.2.2.2........................

...........1.1.1.1.2.2......................

.............1.2.1.1.2.2....................

...............2.2.2.2.3.3..................

.................2.2.2.2.3.3................

...................3.3.2.3.3.3..............

.....................3.3.3.4.4.4............

.......................3.3.4.4.4.4..........

.........................3.3.3.3.4.4........

...........................3.3.4.4.4.4......

.............................3.3.3.3.4.4....

...............................3.3.4.4.4.4..

.................................3.3.3.3.4.4

CROSSREFS

Sequence in context: A119596 A046948 A220056 * A006687 A060893 A165375

Adjacent sequences:  A165380 A165381 A165382 * A165384 A165385 A165386

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 17 2009

STATUS

approved

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Last modified February 21 01:03 EST 2020. Contains 332086 sequences. (Running on oeis4.)