Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
A146000
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =13a(6) =41a(7) =134a(8) =523a(9) =2341a(10) =13112a(11) =85330a(12) =657274a(13) =5867785a(14) =62935391a(15) =796238629a(16) =11963244988a(17) =210625730574
External references
- oeis: A146000