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 A043074 a(n)=(s(n)+6)/9, where s(n)=n-th base 9 palindrome that starts with 3. 1
 1, 4, 28, 29, 30, 31, 32, 33, 34, 35, 36, 244, 254, 264, 274, 284, 294, 304, 314, 324, 2188, 2197, 2206, 2215, 2224, 2233, 2242, 2251, 2260, 2270, 2279, 2288, 2297, 2306, 2315, 2324, 2333, 2342, 2352, 2361, 2370, 2379, 2388, 2397 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..44. MATHEMATICA b9pQ[n_]:=Module[{idn9=IntegerDigits[9n-6, 9]}, idn9==Reverse[idn9]&&idn9[[1]]==3]; Select[ Range[2500], b9pQ] (* Harvey P. Dale, May 19 2023 *) CROSSREFS Sequence in context: A358863 A222594 A153431 * A137314 A032405 A344467 Adjacent sequences: A043071 A043072 A043073 * A043075 A043076 A043077 KEYWORD nonn,base AUTHOR Clark Kimberling STATUS approved

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Last modified June 3 13:22 EDT 2023. Contains 363110 sequences. (Running on oeis4.)