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 1-8 of 8 results.

A173478 a(n) = the smallest number ending in n-1 zeros divisible by n.

Original entry on oeis.org

1, 10, 300, 1000, 10000, 300000, 7000000, 10000000, 900000000, 1000000000, 110000000000, 300000000000, 13000000000000, 70000000000000, 300000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Mar 04 2010

Keywords

Comments

A173479 a(n) = the smallest n-digit number ending in n-1 zeros that is divisible by n, else 0.

Original entry on oeis.org

1, 10, 300, 1000, 10000, 300000, 7000000, 10000000, 900000000, 1000000000, 0, 300000000000, 0, 70000000000000, 300000000000000, 1000000000000000, 0, 900000000000000000, 0, 10000000000000000000, 0, 0, 0, 300000000000000000000000, 1000000000000000000000000, 0, 0, 7000000000000000000000000000, 0
Offset: 1

Views

Author

Jaroslav Krizek, Feb 19 2010

Keywords

Comments

Programs

  • Maple
    f:= proc(n) local i; for i from 1 to 9 do if i*10^(n-1) mod n = 0 then return i*10^(n-1) fi od: 0 end proc:
    map(f, [$1..20]); # Robert Israel, Jan 16 2017

Extensions

a(16)-a(29) from Robert Israel, Jan 16 2017

A173484 a(n) = the smallest number ending in n+1 zeros divisible by n.

Original entry on oeis.org

100, 1000, 30000, 100000, 1000000, 30000000, 700000000, 1000000000, 90000000000, 100000000000, 11000000000000, 30000000000000, 1300000000000000, 7000000000000000, 30000000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Mar 04 2010

Keywords

Comments

Crossrefs

Cf. A132740.

Programs

  • Maple
    f:= n -> 10^(n+1)*n/2^padic:-ordp(n,2)/5^padic:-ordp(n,5):
    map(f, [$1..30]); # Robert Israel, Jun 28 2018

Formula

a(n) = 10^(n+1)*A132740(n). - Robert Israel, Jun 28 2018

A173480 a(n) = the largest n-digit number ending in n-1 zeros that is divisible by n, else 0.

Original entry on oeis.org

9, 90, 900, 9000, 90000, 900000, 7000000, 90000000, 900000000, 90000000000, 0, 900000000000, 0, 70000000000000, 900000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Feb 19 2010

Keywords

Comments

A173481 a(n) = the smallest number ending in n zeros divisible by n.

Original entry on oeis.org

10, 100, 3000, 10000, 100000, 3000000, 70000000, 100000000, 9000000000, 10000000000, 1100000000000, 3000000000000, 130000000000000, 700000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Mar 04 2010

Keywords

Comments

A173482 a(n) = the smallest (n+1)-digit number ending in n zeros that is divisible by n, else 0.

Original entry on oeis.org

10, 100, 3000, 10000, 100000, 3000000, 70000000, 100000000, 9000000000, 10000000000, 0, 3000000000000, 0, 700000000000000, 3000000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Feb 19 2010

Keywords

Comments

A173483 a(n) = the largest (n+1)-digit number ending in n zeros that is divisible by n, else 0.

Original entry on oeis.org

90, 900, 9000, 90000, 900000, 9000000, 70000000, 900000000, 9000000000, 90000000000, 0, 9000000000000, 0, 700000000000000, 9000000000000000, 90000000000000000, 0, 9000000000000000000, 0, 900000000000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Feb 19 2010

Keywords

Comments

Formula

If A006530(n) > 7, then a(n)=0. [From R. J. Mathar, Mar 12 2010]

Extensions

More terms from R. J. Mathar, Mar 12 2010

A173485 a(n) = the smallest (n+2)-digit number ending in n+1 zeros that is divisible by n, else 0.

Original entry on oeis.org

100, 1000, 30000, 100000, 1000000, 30000000, 700000000, 1000000000, 90000000000, 100000000000, 0, 30000000000000, 0, 7000000000000000, 30000000000000000
Offset: 1

Views

Author

Jaroslav Krizek, Feb 19 2010

Keywords

Comments

Showing 1-8 of 8 results.