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A043049 a(n)=(s(n)+1)/4, where s(n)=n-th base 4 palindrome that starts with 3. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 14 09:49 EST 2018. Contains 318095 sequences. (Running on oeis4.)