|
| |
|
|
A185987
|
|
1/128 the number of (n+2)X5 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace
|
|
1
|
|
|
|
28, 722, 8948, 126739, 1739442, 24122605, 333538097, 4615215875, 63844594023, 883270694055, 12219509684695, 169050651027735, 2338723275837734, 32354979102185567, 447613652532361538, 6192493431932333949
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
FORMULA
|
Empirical: a(n)=17*a(n-1)-39*a(n-2)-158*a(n-3)+1567*a(n-4)-3928*a(n-5)-5958*a(n-6)+47922*a(n-7)-46802*a(n-8)-202583*a(n-9)+246113*a(n-10)-128185*a(n-11)+4114302*a(n-12)-1483927*a(n-13)-29625981*a(n-14)+13511171*a(n-15)+76029112*a(n-16)-7956342*a(n-17)+85229343*a(n-18)-481211069*a(n-19)-392947650*a(n-20)+1047461959*a(n-21)+1637233339*a(n-22)-978115420*a(n-23)-1982953964*a(n-24)-4158305193*a(n-25)-241488383*a(n-26)+13538130519*a(n-27)+5855596973*a(n-28)-11895093120*a(n-29)-20096457463*a(n-30)-2029592944*a(n-31)+26990431520*a(n-32)+16764566364*a(n-33)-8597636550*a(n-34)-25031867349*a(n-35)-11357359031*a(n-36)+11024845806*a(n-37)+15253304835*a(n-38)+8697899279*a(n-39)-5252620183*a(n-40)-9350069199*a(n-41)-8911883410*a(n-42)+2611952389*a(n-43)+7288771313*a(n-44)+3325978952*a(n-45)-263839229*a(n-46)-3173918417*a(n-47)-1346057329*a(n-48)-272675965*a(n-49)+638497765*a(n-50)+789245994*a(n-51)+137404640*a(n-52)-139120928*a(n-53)-231809952*a(n-54)+1679360*a(n-55)+16108288*a(n-56)+19115648*a(n-57)+285952*a(n-58)-1990656*a(n-59)
|
|
|
EXAMPLE
|
Some solutions for 4X5
..1..0..1..1..1....1..1..1..1..1....1..0..1..0..0....1..1..0..0..1
..1..1..1..0..1....1..0..0..0..1....1..1..1..1..1....1..0..0..1..0
..1..1..0..0..1....0..0..1..1..1....0..0..0..0..0....0..1..1..0..0
..0..1..0..0..1....1..0..1..0..0....0..1..1..0..1....0..1..0..1..1
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
