A043074 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A043074

a(n)=(s(n)+6)/9, where s(n)=n-th base 9 palindrome that starts with 3.

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