Number of irredundant sets in the n-pan graph.

Terms

a(0) =3a(1) =5a(2) =7a(3) =16a(4) =26a(5) =42a(6) =72a(7) =125a(8) =216a(9) =367a(10) =629a(11) =1079a(12) =1852a(13) =3173a(14) =5438a(15) =9323a(16) =15984a(17) =27401a(18) =46971a(19) =80522a(20) =138039a(21) =236639a(22) =405665a(23) =695425a(24) =1192158a(25) =2043700a(26) =3503484a(27) =6005970a(28) =10295947a(29) =17650192