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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 STATUS approved

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Last modified November 17 12:39 EST 2018. Contains 317276 sequences. (Running on oeis4.)