a(n) = n + 1 when n <= 3, otherwise a(n) = 2^(n-2) + 3; also iterates of A005187 starting from a(1) = 2.
A256994
a(n) = n + 1 when n <= 3, otherwise a(n) = 2^(n-2) + 3; also iterates of A005187 starting from a(1) = 2.
Terms
- a(0) =2a(1) =3a(2) =4a(3) =7a(4) =11a(5) =19a(6) =35a(7) =67a(8) =131a(9) =259a(10) =515a(11) =1027a(12) =2051a(13) =4099a(14) =8195a(15) =16387a(16) =32771a(17) =65539a(18) =131075a(19) =262147a(20) =524291a(21) =1048579a(22) =2097155a(23) =4194307a(24) =8388611a(25) =16777219a(26) =33554435a(27) =67108867a(28) =134217731a(29) =268435459
External references
- oeis: A256994