Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.
A145928
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =10a(5) =33a(6) =134a(7) =947a(8) =8780a(9) =97821a(10) =1375312a(11) =27712816a(12) =754977953a(13) =26645291289
External references
- oeis: A145928