Number of (n+1) X 3 0..1 arrays with the permanents of all 2 X 2 subblocks equal and nonzero.

A204707

Number of (n+1) X 3 0..1 arrays with the permanents of all 2 X 2 subblocks equal and nonzero.

Terms

    a(0) =13a(1) =33a(2) =81a(3) =209a(4) =529a(5) =1361a(6) =3473a(7) =8913a(8) =22801a(9) =58449a(10) =149649a(11) =383441a(12) =982033a(13) =2515793a(14) =6443921a(15) =16507089a(16) =42282769a(17) =108311121a(18) =277442193a(19) =710686673a(20) =1820455441a(21) =4663202129a(22) =11945023889a(23) =30597832401a(24) =78377927953a(25) =200769257553

External references