Number of total dominating sets in the n-gear graph.

Terms

a(0) =3a(1) =21a(2) =48a(3) =161a(4) =473a(5) =1476a(6) =4553a(7) =14241a(8) =44688a(9) =141081a(10) =447153a(11) =1422596a(12) =4539473a(13) =14522361a(14) =46556048a(15) =149508801a(16) =480810153a(17) =1548053316a(18) =4988972313a(19) =16090635281a(20) =51928966928a(21) =167675418921a(22) =541639730273