Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 2X3 U in any orientation.
A146057
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 2X3 U in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =13a(6) =31a(7) =133a(8) =759a(9) =5033a(10) =38887a(11) =382421a(12) =4832387a(13) =75700651a(14) =1478349269a(15) =35999240895
External references
- oeis: A146057