A043049 a(n)=(s(n)+1)/4, where s(n)=n-th base 4 palindrome that starts with 3.

1, 4, 13, 14, 15, 16, 49, 54, 59, 64, 193, 197, 201, 205, 210, 214, 218, 222, 227, 231, 235, 239, 244, 248, 252, 256, 769, 789, 809, 829, 834, 854, 874, 894, 899, 919, 939, 959, 964, 984, 1004, 1024, 3073, 3089, 3105, 3121, 3141

Offset

1,2

Links

Table of n, a(n) for n=1..47.

Crossrefs

Sequence in context: A081738 A232496 A239256 * A135465 A135783 A135406

Adjacent sequences: A043046 A043047 A043048 * A043050 A043051 A043052

Keyword

nonn,base

Author

Clark Kimberling

Status

approved