Number of irredundant sets in the n-crown graph.

Terms

a(0) =24a(1) =77a(2) =178a(3) =373a(4) =724a(5) =1331a(6) =2364a(7) =4127a(8) =7186a(9) =12625a(10) =22558a(11) =41153a(12) =76680a(13) =145607a(14) =280792a(15) =547867a(16) =1078006a(17) =2133461a(18) =4238634a(19) =8442221a(20) =16841500a(21) =33630907a(22) =67199188a(23) =134323703a(24) =268559034a(25) =537014201a(26) =1073907094a(27) =2147673337a(28) =4295184016a(29) =8590181135