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.

A353142 Decimal repunits written in base 3.

Original entry on oeis.org

0, 1, 102, 11010, 1112011, 120020112, 12122102020, 2002110011021, 202220111120122, 21202002000210100, 2212102202021220101, 1001200100111221000202, 101121210112011021021110, 10221012222020120200202111, 1110100012201102210221120212
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353143, A353144, A353145, A353146, A353147, A353148.
Cf. A003462, A007089, A055474.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 3));

Formula

a(n) = A007089(A002275(n)).
a(n) = (A055474(n) - 1)/100. - Hugo Pfoertner, Apr 26 2022

A353143 Decimal repunits written in base 4.

Original entry on oeis.org

0, 1, 23, 1233, 101113, 2231213, 123020013, 10033101013, 222120223013, 12213312233013, 1002032203113013, 22112101201213013, 1213132233100013013, 100022303120201013013, 2201230001311023013013, 121100320102103233013013, 3330220302313011113013013
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353144, A353145, A353146, A353147, A353148.
Cf. A002450, A007090.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 4));

Formula

a(n) = A007090(A002275(n)).

A353144 Decimal repunits written in base 5.

Original entry on oeis.org

0, 1, 21, 421, 13421, 323421, 12023421, 241023421, 10321023421, 211421023421, 4233421023421, 140223421023421, 3310023421023421, 121201023421023421, 2424021023421023421, 104030421023421023421, 2131113421023421023421, 43122323421023421023421, 1413002023421023421023421
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353143, A353145, A353146, A353147, A353148.
Cf. A003463, A007091.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 5));

Formula

a(n) = A007091(A002275(n)).

A353145 Decimal repunits written in base 6.

Original entry on oeis.org

0, 1, 15, 303, 5051, 123235, 2214223, 35452011, 1034052155, 15005255143, 302130544531, 5034313401115, 123013240420103, 2210234251121451, 35344212440150035, 1032151423443021023, 14535045221530334411, 301223205551110014555
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353143, A353144, A353146, A353147, A353148.
Cf. A003464, A007092.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 6));

Formula

a(n) = A007092(A002275(n)).

A353146 Decimal repunits written in base 7.

Original entry on oeis.org

0, 1, 14, 216, 3145, 44252, 641640, 12305251, 163304624, 2516300046, 36351200665, 542225612642, 11012302601310, 143163240420331, 2224515456064634, 32255340625240206, 453016062064453015, 6552245200234552232, 125142553603416142350
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353143, A353144, A353145, A353147, A353148.
Cf. A007093, A023000.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 7));

Formula

a(n) = A007093(A002275(n)).

A353147 Decimal repunits written in base 8.

Original entry on oeis.org

0, 1, 13, 157, 2127, 25547, 331007, 4172107, 52305307, 647665707, 10216432707, 122621414707, 1473657200707, 20126330410707, 241540165130707, 3120702223570707, 37450626705270707, 473627744665470707, 6125757360430070707, 75533532545361070707
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353143, A353144, A353145, A353146, A353148.
Cf. A007094, A023001.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 8));
  • Python
    def a(n): return 0 if n == 0 else int(oct(int("1"*n))[2:])
print([a(n) for n in range(13)]) # Michael S. Branicky, Apr 26 2022

Formula

a(n) = A007094(A002275(n)).

A353148 Decimal repunits written in base 9.

Original entry on oeis.org

0, 1, 12, 133, 1464, 16215, 178366, 2073137, 22814518, 252060710, 2772667811, 31610457022, 347715137243, 3835866520674, 43305642727525, 476363171113776, 5351104882252647, 58862154814780228, 658583714063682520, 7355531854711617721, 82021851512827806032
Offset: 0

Views

Author

Seiichi Manyama, Apr 26 2022

Keywords

Crossrefs

Cf. A002275, A291962, A353142, A353143, A353144, A353145, A353146, A353147.
Cf. A002452, A007095, A055479.

Programs

  • PARI
    a(n) = fromdigits(digits((10^n-1)/9, 9));

Formula

a(n) = A007095(A002275(n)).
a(n) = (A055479(n) - 1)/10. - Hugo Pfoertner, Apr 26 2022

A055473 Powers of ten written in base 2.

Original entry on oeis.org

1, 1010, 1100100, 1111101000, 10011100010000, 11000011010100000, 11110100001001000000, 100110001001011010000000, 101111101011110000100000000, 111011100110101100101000000000, 1001010100000010111110010000000000, 1011101001000011101101110100000000000
Offset: 0

Views

Author

Henry Bottomley, Jun 27 2000

Keywords

Links

Crossrefs

Cf. A007088, A011557, A291962.
Cf. A000468, A055474, A055475, A055476, A055477, A055478, A055479.

Programs

  • Mathematica
    FromDigits /@ IntegerDigits[10^Range[0, 9], 2] (* Jayanta Basu, Jul 12 2013 *)
  • PARI
    a(n)=subst(Pol(binary(10^n)),x,10)
  • PARI
    a(n) = fromdigits(binary(10^n)); \\ Michel Marcus, Apr 27 2022
  • Python
    def a(n): return int(bin(10**n)[2:])
print([a(n) for n in range(12)]) # Michael S. Branicky, Apr 27 2022

Formula

a(n) = A007088(A011557(n)). - Seiichi Manyama, Apr 27 2022
Showing 1-8 of 8 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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