The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A232147 Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, diagonally or antidiagonally 1
 15, 1299, 67725, 3409361, 177194147, 9181257593, 475203378037, 24603676419865, 1273862365412567, 65953469881024617, 3414709863495247187, 176795083880911066285, 9153485056416819219765, 473917527399880366302693 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A232149 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 35*a(n-1) +649*a(n-2) +10479*a(n-3) +50649*a(n-4) -148850*a(n-5) -4594482*a(n-6) -29446017*a(n-7) -109126913*a(n-8) -189857827*a(n-9) +786606763*a(n-10) +4637371935*a(n-11) +5864860064*a(n-12) -12212688755*a(n-13) -42763674878*a(n-14) -28294485410*a(n-15) +57477014048*a(n-16) +126547355711*a(n-17) +64552653143*a(n-18) -60155915760*a(n-19) -96981273076*a(n-20) -64212382080*a(n-21) -123120194790*a(n-22) -55873185285*a(n-23) -22972924737*a(n-24) +79085877984*a(n-25) +44270889165*a(n-26) +95126815696*a(n-27) +10764163372*a(n-28) +18110185584*a(n-29) -9929666880*a(n-30) -6320643840*a(n-31) +1858775040*a(n-32) EXAMPLE Some solutions for n=3 ..0..2..2..2....2..2..0..1....2..1..2..2....0..2..1..1....0..1..2..0 ..0..1..0..1....0..1..2..1....0..1..2..1....1..1..2..1....2..1..1..0 ..1..2..2..2....0..1..2..1....2..2..0..1....2..2..1..1....0..2..2..0 CROSSREFS Sequence in context: A220179 A166330 A300618 * A232288 A183550 A071972 Adjacent sequences:  A232144 A232145 A232146 * A232148 A232149 A232150 KEYWORD nonn AUTHOR R. H. Hardin, Nov 19 2013 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.

Last modified November 30 21:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)