Number of irredundant sets in the n-dipyramidal graph.

Terms

a(0) =7a(1) =22a(2) =29a(3) =39a(4) =60a(5) =94a(6) =151a(7) =241a(8) =400a(9) =671a(10) =1135a(11) =1924a(12) =3277a(13) =5598a(14) =9575a(15) =16389a(16) =28067a(17) =48089a(18) =82411a(19) =141246a(20) =242102a(21) =414999a(22) =711394a(23) =1219497a(24) =2090527a(25) =3583720a(26) =6143480a(27) =10531637a(28) =18054187a(29) =30949982