Equals two maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..2 nX2 array.
A220372
Equals two maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..2 nX2 array.
Terms
- a(0) =1a(1) =6a(2) =23a(3) =94a(4) =380a(5) =1494a(6) =5939a(7) =23398a(8) =92317a(9) =363370a(10) =1430190a(11) =5625584a(12) =22124617a(13) =86997410a(14) =342060007a(15) =1344843036a(16) =5287206382a(17) =20786010360a(18) =81716574499a(19) =321251714484
External references
- oeis: A220372