cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A255588 Convert n to base 3, move the least significant digit to the most significant one and convert back to base 10.

Original entry on oeis.org

0, 1, 2, 1, 4, 7, 2, 5, 8, 3, 12, 21, 4, 13, 22, 5, 14, 23, 6, 15, 24, 7, 16, 25, 8, 17, 26, 9, 36, 63, 10, 37, 64, 11, 38, 65, 12, 39, 66, 13, 40, 67, 14, 41, 68, 15, 42, 69, 16, 43, 70, 17, 44, 71, 18, 45, 72, 19, 46, 73, 20, 47, 74, 21, 48, 75, 22, 49, 76, 23
Offset: 0

Views

Author

Paolo P. Lava, Feb 27 2015

Keywords

Comments

a(3*n) = n.
Fixed points of the transform are listed in A048328.

Examples

			10 in base 3 is 101: moving the least significant digit to the most significant one we have 110 that is 12 in base 10.
		

Crossrefs

Programs

  • Maple
    with(numtheory): P:=proc(q,h) local a,b,k,n; print(0);
    for n from 1 to q do
    a:=convert(n,base,h); b:=[]; for k from 2 to nops(a) do b:=[op(b),a[k]]; od; a:=[op(b),a[1]];
    a:=convert(a,base,h,10); b:=0; for k from nops(a) by -1 to 1 do b:=10*b+a[k]; od;
    print(b); od; end: P(10^4,3);
  • Mathematica
    roll[n_, b_] := Block[{w = IntegerDigits[n, b]}, Prepend[Most@ w, Last@ w]]; b = 3; FromDigits[#, b] & /@ (roll[#, b] & /@ Range[0, 69]) (* Michael De Vlieger, Mar 04 2015 *)
    Table[FromDigits[RotateRight[IntegerDigits[n,3]],3],{n,0,70}] (* Harvey P. Dale, Feb 20 2022 *)
  • Python
    def A255588(n):
        x=A007089(n)
        return int(x[-1]+x[:-1], 3) # Indranil Ghosh, Feb 03 2017

A255590 Convert n to base 5, move the least significant digit to the most significant one and convert back to base 10.

Original entry on oeis.org

0, 1, 2, 3, 4, 1, 6, 11, 16, 21, 2, 7, 12, 17, 22, 3, 8, 13, 18, 23, 4, 9, 14, 19, 24, 5, 30, 55, 80, 105, 6, 31, 56, 81, 106, 7, 32, 57, 82, 107, 8, 33, 58, 83, 108, 9, 34, 59, 84, 109, 10, 35, 60, 85, 110, 11, 36, 61, 86, 111, 12, 37, 62, 87, 112, 13, 38, 63, 88
Offset: 0

Views

Author

Paolo P. Lava, Mar 02 2015

Keywords

Comments

a(5*n) = n.
a(5^n) = 5^(n-1).
Fixed points of the transform are listed in A048330.

Examples

			14 in base 5 is 24: moving the least significant digit to the most significant one we have 42 that is 22 in base 10.
		

Crossrefs

Programs

  • Maple
    with(numtheory): P:=proc(q,h) local a,b,k,n; print(0);
    for n from 1 to q do
    a:=convert(n,base,h); b:=[]; for k from 2 to nops(a) do b:=[op(b),a[k]]; od; a:=[op(b),a[1]];
    a:=convert(a,base,h,10); b:=0; for k from nops(a) by -1 to 1 do b:=10*b+a[k]; od;
    print(b); od; end: P(10^4,5);
  • Mathematica
    roll[n_, b_] := Block[{w = IntegerDigits[n, b]}, Prepend[Most@ w, Last@ w]]; b = 5; FromDigits[#, b] & /@ (roll[#, b] & /@ Range[0, 68]) (* Michael De Vlieger, Mar 04 2015 *)
    Table[FromDigits[RotateRight[IntegerDigits[n,5]],5],{n,0,100}] (* Harvey P. Dale, Jun 11 2025 *)
  • Python
    def A255590(n):
        x=str(A007091(n))
        return int(x[-1]+x[:-1], 5) # Indranil Ghosh, Feb 03 2017
Showing 1-2 of 2 results.