The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A305877 Numbers in base 3 reversed. 2
 0, 1, 2, 1, 11, 21, 2, 12, 22, 1, 101, 201, 11, 111, 211, 21, 121, 221, 2, 102, 202, 12, 112, 212, 22, 122, 222, 1, 1001, 2001, 101, 1101, 2101, 201, 1201, 2201, 11, 1011, 2011, 111, 1111, 2111, 211, 1211, 2211, 21, 1021, 2021, 121, 1121, 2121, 221, 1221, 2221, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS David F. Marrs, Table of n, a(n) for n = 0..10000 FORMULA a(n) = A004086(A007089(n)). - Felix FrÃ¶hlich, Jun 14 2018 EXAMPLE 11 is 102 in base 3, and reversing it gives 201 = a(11). MAPLE a:= n-> parse(cat(convert(n, base, 3)[])): seq(a(n), n=0..75);  # Alois P. Heinz, Jun 17 2018 MATHEMATICA Table[FromDigits@ Reverse@ IntegerDigits[n, 3], {n, 0, 54}] (* Giovanni Resta, Jun 13 2018 *) PROG (PARI) a(n) = fromdigits(Vecrev(digits(n, 3)), 10); \\ Michel Marcus, Jun 13 2018 CROSSREFS Cf. A004086 (in base 10), A007089, A030102 (when converted in base 10). Sequence in context: A101851 A300455 A270264 * A111724 A184299 A080371 Adjacent sequences:  A305874 A305875 A305876 * A305878 A305879 A305880 KEYWORD nonn,base,easy AUTHOR David F. Marrs, Jun 13 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 23 00:28 EST 2020. Contains 332157 sequences. (Running on oeis4.)