log(n) is closer to an integer than is log(m) for any m with 2<=m<n.

Terms

a(0) =2a(1) =3a(2) =7a(3) =20a(4) =148a(5) =403a(6) =1096a(7) =1097a(8) =2980a(9) =2981a(10) =8103a(11) =59874a(12) =162755a(13) =442413a(14) =1202604a(15) =3269017a(16) =8886110a(17) =8886111a(18) =24154952a(19) =24154953a(20) =65659969a(21) =178482301a(22) =3584912846a(23) =9744803446a(24) =26489122130a(25) =72004899337a(26) =195729609428