Equals one maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..1 nX2 array.
A220283
Equals one maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..1 nX2 array.
Terms
- a(0) =2a(1) =4a(2) =31a(3) =96a(4) =424a(5) =1422a(6) =5504a(7) =19606a(8) =73294a(9) =266630a(10) =985354a(11) =3607564a(12) =13279027a(13) =48721400a(14) =179090319a(15) =657572014a(16) =2415928734a(17) =8872778822a(18) =32593085529a(19) =119711114434a(20) =439717298204
External references
- oeis: A220283