Number of irredundant sets in the n-double cone graph.

Terms

a(0) =2a(1) =10a(2) =17a(3) =122a(4) =257a(5) =577a(6) =1850a(7) =5626a(8) =16901a(9) =47525a(10) =140626a(11) =414737a(12) =1223237a(13) =3583450a(14) =10523537a(15) =30946970a(16) =90973445a(17) =267322501a(18) =785456677a(19) =2308418117a(20) =6784157957a(21) =19937157602a(22) =58589654810a(23) =172181842705a(24) =506006018282