Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.
A259996
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.
Terms
- a(0) =284a(1) =805a(2) =2532a(3) =6157a(4) =13562a(5) =39209a(6) =112570a(7) =265595a(8) =662116a(9) =1906817a(10) =4983158a(11) =12082675a(12) =32339598a(13) =88603673a(14) =223563456a(15) =569090083a(16) =1539186674a(17) =4049079097a(18) =10269959842a(19) =26926828037a(20) =71786606702a(21) =185590064541a(22) =478561927772
External references
- oeis: A259996