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 1-3 of 3 results.

A161750 Numbers n such that the decimal digits of 123456789*n are all distinct.

Original entry on oeis.org

0, 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 20, 22, 23, 25, 26, 31, 32, 34, 35, 40, 41, 43, 44, 50, 52, 53, 61, 62, 70, 71, 80
Offset: 1

Views

Author

Kyle Stern, Jun 17 2009

Keywords

Crossrefs

Cf. A053654. [From Zak Seidov, Nov 04 2009]

Programs

  • Maple
    a := proc (n) local nn, nnn: nn := convert(123456789*n, base, 10): nnn := convert(nn, set): if nops(nn) = nops(nnn) then n else end if end proc: seq(a(n), n = 1 .. 80); # Emeric Deutsch, Jun 21 2009
  • Mathematica
    m=123456789;se=Select[Range[0,99],Sort[id=IntegerDigits[m*# ]]==Union[id]&] (* Zak Seidov, Nov 04 2009 *)
    Select[Range[0,100],Max[DigitCount[123456789#]]==1&] (* Harvey P. Dale, Jun 02 2017 *)

Extensions

a(1)=0 added by Zak Seidov, Nov 04 2009
Edited by Charles R Greathouse IV, Aug 02 2010

A167461 Anagram multiples of 123456789.

Original entry on oeis.org

1234567890, 1358024679, 1604938257, 1728395046, 1975308624, 2098765413, 2469135780, 2716049358, 2839506147, 3086419725, 3209876514, 3827160459, 3950617248, 4197530826, 4320987615, 4938271560, 5061728349, 5308641927
Offset: 1

Views

Author

Zak Seidov, Nov 04 2009

Keywords

Comments

There are exactly 27 all_ten_distinct_digit numbers divisible by 123456789:
1234567890, 1358024679, 1604938257, 1728395046, 1975308624, 2098765413,
2469135780, 2716049358, 2839506147, 3086419725, 3209876514, 3827160459,
3950617248, 4197530826, 4320987615, 4938271560, 5061728349, 5308641927,
5432098716, 6172839450, 6419753028, 6543209817, 7530864129, 7654320918,
8641975230, 8765432019, 9876543120.

Crossrefs

Cf. A050278 (Pandigital numbers: numbers containing the digits 0-9), A053654, A161750.

A167476 Pandigital numbers n with at least 4 nontrivial anagrams divisible by n.

Original entry on oeis.org

1039675824, 1053826974, 1068253974, 1068379524, 1073968254, 1075396824, 1098765432, 1204756839, 1234567890, 1357802469
Offset: 1

Views

Author

Zak Seidov, Nov 04 2009

Keywords

Comments

For a(7) and a(9), there are 5 nontrivial anagrams divisible by n.
List of anagrams:
{1039675824,2079351648,4158703296,8317406592,9357082416},
{1053826974,2107653948,4215307896,5269134870,8430615792},
{1068253974,2136507948,4273015896,5341269870,8546031792},
{1068379524,2136759048,4273518096,5341897620,8547036192},
{1073968254,2147936508,4295873016,5369841270,8591746032},
{1075396824,2150793648,4301587296,5376984120,8603174592},
{1098765432,2197530864,4395061728,5493827160,7691358024,8790123456},
{1204756839,2409513678,4819027356,6023784195,9638054712},
{1234567890,2469135780,4938271560,6172839450,8641975230,9876543120},
{1357802469,2715604938,5431209876,6789012345,9504617283}.

Examples

			a(1)=1039675824 with 4 anagram multiples:
2*a(1)=2079351648, 4*a(1)=4158703296, 8*a(1)=8317406592, 9*a(1)=9357082416;
a(2)=1053826974 with 4 anagram multiples:
2*a(2)=2107653948, 4*a(2)=4215307896, 5*a(2)=5269134870, 8*a(2)=8430615792.
		

Crossrefs

Showing 1-3 of 3 results.