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!)
A255085 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0 1
265, 522, 964, 2005, 4405, 9989, 22601, 50980, 114903, 261406, 602851, 1401088, 3245506, 7500936, 17319501, 40038474, 92880007, 215939488, 501628958, 1164460794, 2701599314, 6267866505, 14554457354, 33816400387, 78558506481 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A255091
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +4*a(n-3) -7*a(n-4) +3*a(n-5) +46*a(n-6) -82*a(n-7) -9*a(n-8) -181*a(n-9) +196*a(n-10) +89*a(n-11) -355*a(n-12) +732*a(n-13) -290*a(n-14) +1502*a(n-15) -1205*a(n-16) -230*a(n-17) -1083*a(n-18) -55*a(n-19) +4028*a(n-20) -1887*a(n-21) -3041*a(n-22) -9746*a(n-23) +12398*a(n-24) -1671*a(n-25) -4434*a(n-26) +758*a(n-27) +6494*a(n-28) +13036*a(n-29) -13950*a(n-30) -7238*a(n-31) +3939*a(n-32) +930*a(n-33) +3151*a(n-34) +11426*a(n-35) -8355*a(n-36) +11264*a(n-37) -3305*a(n-38) -24571*a(n-39) -1385*a(n-40) -30463*a(n-41) +39169*a(n-42) +30778*a(n-43) -28015*a(n-44) +49273*a(n-45) -30298*a(n-46) +7143*a(n-47) -26077*a(n-48) -46184*a(n-49) +42616*a(n-50) -17187*a(n-51) +20053*a(n-52) +16934*a(n-53) -10891*a(n-54) +15587*a(n-55) -17668*a(n-56) -6437*a(n-57) +1936*a(n-58) -6532*a(n-59) +9455*a(n-60) +1506*a(n-61) -1843*a(n-62) -321*a(n-63) +435*a(n-64) +549*a(n-65) -122*a(n-66) +414*a(n-67) -714*a(n-68) -166*a(n-69) +132*a(n-70) -4*a(n-71) +27*a(n-72) -13*a(n-73) +4*a(n-74) -5*a(n-75) +11*a(n-76) +3*a(n-77) -a(n-78) -a(n-80) for n>84
EXAMPLE
Some solutions for n=4
..0..1..1..1....1..0..0..1....1..1..1..1....0..0..1..0....1..1..1..0
..1..1..1..1....1..1..1..0....1..1..1..0....1..1..1..1....1..1..0..1
..1..1..1..0....0..1..1..1....1..1..0..1....1..0..1..1....1..0..0..1
..1..1..0..0....1..0..1..0....1..0..0..1....0..1..1..1....1..0..1..1
..1..0..0..1....0..1..0..1....1..0..1..1....1..1..1..1....0..1..1..1
..0..0..1..1....1..1..0..0....0..1..1..1....1..1..1..0....1..1..0..1
CROSSREFS
Sequence in context: A345595 A345854 A051976 * A146335 A211714 A259741
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 14 2015
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)