Number of dominating induced trees in the n-ladder graph P_2_X P_n.

Terms

a(0) =3a(1) =8a(2) =17a(3) =32a(4) =66a(5) =130a(6) =262a(7) =522a(8) =1046a(9) =2090a(10) =4182a(11) =8362a(12) =16726a(13) =33450a(14) =66902a(15) =133802a(16) =267606a(17) =535210a(18) =1070422a(19) =2140842a(20) =4281686a(21) =8563370a(22) =17126742a(23) =34253482a(24) =68506966a(25) =137013930a(26) =274027862a(27) =548055722a(28) =1096111446a(29) =2192222890