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A043003 n-th base 4 palindrome that starts with 1. 1
1, 5, 17, 21, 25, 29, 65, 85, 105, 125, 257, 273, 289, 305, 325, 341, 357, 373, 393, 409, 425, 441, 461, 477, 493, 509, 1025, 1105, 1185, 1265, 1285, 1365, 1445, 1525, 1545, 1625, 1705, 1785, 1805, 1885, 1965, 2045, 4097, 4161 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Join[{1}, Table[FromDigits[#, 4]&/@(Join[{1}, #, {1}]&/@Select[Tuples[ Range[ 0, 3], n], #==Reverse[#]&]), {n, 0, 5}]//Flatten]

CROSSREFS

Sequence in context: A045095 A061940 A038470 * A246329 A211423 A211426

Adjacent sequences:  A043000 A043001 A043002 * A043004 A043005 A043006

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 21 19:52 EDT 2017. Contains 290906 sequences.