Number of minimal total dominating sets in the n-ladder graph.

Terms

a(0) =1a(1) =4a(2) =4a(3) =16a(4) =16a(5) =49a(6) =81a(7) =169a(8) =324a(9) =625a(10) =1296a(11) =2401a(12) =4900a(13) =9409a(14) =18769a(15) =36481a(16) =71824a(17) =141376a(18) =276676a(19) =544644a(20) =1067089a(21) =2099601a(22) =4116841a(23) =8088336a(24) =15880225a(25) =31181056a(26) =61230625a(27) =120209296a(28) =236083225a(29) =463497841