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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A253311 Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally 1
157476, 214676, 1547188, 2643738, 16534784, 53883500, 300393602, 1497743060, 8035298482, 45266774466, 241316843208, 1391655422404, 7413686922900, 42921707803250, 228637291518078, 1324593318241030, 7055545301565708 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A253314

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +67*a(n-2) -221*a(n-3) -1705*a(n-4) +3766*a(n-5) +24361*a(n-6) -25780*a(n-7) -238558*a(n-8) +83102*a(n-9) +1868040*a(n-10) -372421*a(n-11) -13197408*a(n-12) +472971*a(n-13) +82477323*a(n-14) +38351344*a(n-15) -404587678*a(n-16) -408299522*a(n-17) +1469464881*a(n-18) +2135255996*a(n-19) -4201285211*a(n-20) -8163564407*a(n-21) +10687359918*a(n-22) +28536815020*a(n-23) -24274016201*a(n-24) -91101166968*a(n-25) +39551202432*a(n-26) +251885946474*a(n-27) +3883996008*a(n-28) -575621103114*a(n-29) -284779663542*a(n-30) +978703356996*a(n-31) +814744669662*a(n-32) -1294671181824*a(n-33) -1005542860752*a(n-34) +1789131211488*a(n-35) +853171784028*a(n-36) -1851793130952*a(n-37) -979745778576*a(n-38) +408330710928*a(n-39) +857804945472*a(n-40) +438949375776*a(n-41) -1146222761328*a(n-42) -637951539168*a(n-43) +542336878944*a(n-44) +312767593920*a(n-45) +460412138880*a(n-46) +139057088256*a(n-47) -529411603968*a(n-48) -196091808768*a(n-49) +146932807680*a(n-50) +58773123072*a(n-51) for n>69

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A245681 A278862 A250595 * A253659 A253729 A034210

Adjacent sequences:  A253308 A253309 A253310 * A253312 A253313 A253314

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

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 August 2 20:38 EDT 2021. Contains 346428 sequences. (Running on oeis4.)