login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A305338 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero. 1
32, 45, 166, 938, 5296, 30826, 176673, 1020555, 5903993, 34127533, 197271583, 1140610030, 6594835682, 38129175439, 220453330240, 1274613294981, 7369519453297, 42608848364108, 246354614128201, 1424366047791398 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A305340.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +16*a(n-2) +14*a(n-3) -13*a(n-4) -281*a(n-5) -670*a(n-6) +274*a(n-7) +1603*a(n-8) +3401*a(n-9) +6046*a(n-10) -7020*a(n-11) -18219*a(n-12) -5957*a(n-13) -16117*a(n-14) +27348*a(n-15) +81265*a(n-16) -30709*a(n-17) +23300*a(n-18) +22633*a(n-19) -368240*a(n-20) -10352*a(n-21) +445538*a(n-22) -32488*a(n-23) +155016*a(n-24) +69530*a(n-25) -551919*a(n-26) -160147*a(n-27) -162563*a(n-28) +449555*a(n-29) +750932*a(n-30) -755415*a(n-31) -37241*a(n-32) +548305*a(n-33) -813787*a(n-34) +196587*a(n-35) +778224*a(n-36) -625744*a(n-37) -247332*a(n-38) +474811*a(n-39) -35777*a(n-40) -137576*a(n-41) -2246*a(n-42) -53419*a(n-43) +57524*a(n-44) +63750*a(n-45) -23784*a(n-46) -22418*a(n-47) -13373*a(n-48) +1509*a(n-49) +7244*a(n-50) +103*a(n-51) +1683*a(n-52) -321*a(n-53) -285*a(n-54) +688*a(n-55) -612*a(n-56) -167*a(n-57) +82*a(n-58) -47*a(n-59) +52*a(n-60) +14*a(n-61) -10*a(n-62) for n>66

EXAMPLE

Some solutions for n=5

..0..1..0..0..0..0. .0..0..0..0..1..0. .0..0..0..0..0..0. .0..1..0..1..0..0

..0..0..0..0..0..0. .1..0..0..0..0..0. .1..0..1..0..0..1. .0..0..0..0..0..0

..0..0..0..1..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .1..0..0..0..0..1

..0..0..0..0..0..0. .0..0..1..0..0..1. .0..0..0..0..0..0. .0..0..0..0..0..0

..0..0..1..0..0..0. .0..0..0..0..0..0. .0..0..0..0..1..0. .0..1..0..0..0..0

CROSSREFS

Cf. A305340.

Sequence in context: A211813 A303959 A304602 * A316418 A304924 A306164

Adjacent sequences:  A305335 A305336 A305337 * A305339 A305340 A305341

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 30 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 19 21:38 EST 2022. Contains 350466 sequences. (Running on oeis4.)