Number of partitions of the vertices of the n-ladder graph into total dominating sets.

Terms

a(0) =1a(1) =3a(2) =3a(3) =9a(4) =19a(5) =51a(6) =129a(7) =339a(8) =883a(9) =2313a(10) =6051a(11) =15843a(12) =41473a(13) =108579a(14) =284259a(15) =744201a(16) =1948339a(17) =5100819a(18) =13354113a(19) =34961523a(20) =91530451a(21) =239629833a(22) =627359043a(23) =1642447299a(24) =4299982849a(25) =11257501251a(26) =29472520899a(27) =77160061449a(28) =202007663443a(29) =528862928883