Numbers n such that b(n)/n - 1/2 < 1/k for all k > n, where b(n) is A004001.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =6a(6) =11a(7) =13a(8) =25a(9) =44a(10) =46a(11) =52a(12) =98a(13) =180a(14) =186a(15) =372a(16) =396a(17) =747a(18) =1489a(19) =1563a(20) =3003a(21) =6059a(22) =11787a(23) =22251a(24) =47152a(25) =89524a(26) =188871a(27) =361441a(28) =758765a(29) =207115