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.

A032545 Integer part of decimal 'base-6 looking' numbers divided by their actual base-6 values, rounded down.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Crossrefs

See also A032532 for explanation.

Programs

  • Mathematica
    Array[IntegerPart[FromDigits[#2]/#1] & @@ {#, IntegerDigits[#, 6]} &, 105] (* Michael De Vlieger, Oct 06 2019 *)
  • PARI
    for(n=1,1e3,v=eval(Vec(Str(n)));if(vecmax(v)<6, print1(n\sum(i=1,#v,v[i]*6^(#v-i))", "))) \\ Charles R Greathouse IV, Apr 08 2012

Formula

a(n) = floor(A007092(n)/n). - Sean A. Irvine, Jun 22 2020

A032546 Numbers that, when expressed in base 6 and then interpreted in base 10, yield a multiple of the original number.

Original entry on oeis.org

1, 2, 3, 4, 5, 308, 4920, 11284, 11914, 144393, 195453, 518659, 866358, 925148, 1010765, 1172718, 1369865, 2141968, 2557924, 4287428, 4296908, 6064590, 8219190, 15347544, 16891738, 18409156, 18532263, 21880744, 23693054
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Comments

Original name: Decimal 'base 6 looking' numbers divided by their actual base 6 values (n) is an integer.

Examples

			308 is a term: 308_10 = 1232_6; 1232 = 308*4. - _Jon E. Schoenfield_, Oct 25 2019
		

Crossrefs

Cf. A032545, A032547. See also A032532 for explanation.

Extensions

Offset changed and Name edited by Jon E. Schoenfield, Oct 25 2019
Showing 1-2 of 2 results.