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 1-10 of 26 results. Next

A032564 Quotient of 'base-16' division described in A032563.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 6, 6, 6, 10, 10, 10, 10, 10, 10, 10, 10, 16, 16, 16, 16, 16, 16, 16, 16, 25, 22, 25, 25, 25, 40, 37, 35, 41, 40, 40, 40, 41, 42, 66, 64, 61, 56, 64, 65, 64, 67, 65, 64, 68, 67
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Crossrefs

See A032563 for explanation.

Programs

  • Maple
    d:= Vector(10^7, 1):
for i from 1 to 7 do
   inds:= 10^i*[$1..10^(7-i)];
   d[inds]:= (2*16^i+3)/5;
od:
b:= Vector(10^7):
b[1]:= 1:
for i from 2 to 10^7 do
  b[i]:= b[i-1]+d[i]
od: map(t-> if type(b[t]/ t,integer) then b[t]/t fi, [$1..10^7]); # Robert Israel, Aug 30 2015

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Oct 02 2000

A032577 Numbers k whose decimal representation, read as a base-23 value and divided by k, yields an integer.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 26, 39, 169, 221, 442, 663, 884, 2405, 2873, 2912, 5980, 26455, 28730, 29120, 31667, 42441, 48841, 52900, 74435, 84882, 104650, 132808, 139380, 413738, 20392554, 23490402, 25209381, 32287569, 234904020, 239235484
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Comments

Original name: Base 23 value of decimal denominator divided by this decimal value (n) is an integer.
Next term is > 2*10^14 - 1. - Frank A. Stevenson, Jan 02 2024
a(68) <= 339601420613312. - David A. Corneth, Jan 02 2024

Examples

			2405 is a term: 2405_23 = 26455 = 2405*11. - _Jon E. Schoenfield_, Oct 25 2019

Links

Crossrefs

Cf. A032578, A032563.

Programs

  • PARI
    is(n) = denominator(fromdigits(digits(n), 23)/n) == 1 \\ David A. Corneth, Jan 02 2024
  • Python
    list(filter(lambda n: int(str(n),23) % n==0, [i for i in range(1,500000)])) # Frank A. Stevenson, Jan 02 2024

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Sep 27 2000
Offset changed and Name edited by Jon E. Schoenfield, Oct 25 2019

A032578 Quotient of 'base-23' division described in A032577.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 4, 5, 5, 5, 5, 11, 10, 10, 11, 24, 23, 23, 27, 27, 25, 27, 27, 27, 62, 55, 53, 63, 335, 310, 300, 326, 713, 703, 690, 726, 704, 755, 762, 1691, 1663, 1611, 1587, 1665, 1574, 1716, 4122, 3719, 4097, 4057, 4005
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Links

Crossrefs

Cf. A032577. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Sep 27 2000
Offset changed to 1 by Jinyuan Wang, Sep 04 2021
Missing term 1663 added by Frank A. Stevenson, Dec 31 2023

A032555 Numbers k whose decimal representation, read as a base-12 value and divided by k, yields an integer.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 11788, 11790, 11818, 11820, 12298, 12328, 12330, 24658, 24660, 25168, 25170, 25200, 36988, 36990, 37498, 37528, 37530, 38038, 38040, 49858, 49860, 158662568, 159006368, 164582768, 1162275366, 1209636884
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Examples

			11788 is a term because reading it as a base-12 number we get 12^4+12^3+7*12^2+8*12+8 = 23576 = 11788*2. - _N. J. A. Sloane_, Oct 13 2019

Crossrefs

Cf. A032556. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Sep 27 2000

A032556 Quotient of 'base-12' division described in A032555.

Original entry on oeis.org

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, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Crossrefs

Cf. A032555. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Sep 27 2000
The next term has an A032555 term > 2.4*10^11
Offset changed to 1 by Jinyuan Wang, Sep 04 2021

A032557 Numbers k whose decimal representation, read as a base-13 value and divided by k, yields an integer.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 1557, 1560, 1614, 23845695, 35999937, 48674232, 209663697, 209663703, 647731785, 761783484, 1259500136, 2625469053, 3890642833, 12595001360, 13126445350, 26254690530, 38906428330, 176590016643
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Comments

Previous name: Base 13 value of decimal denominator divided by this decimal value (n) is an integer.

Examples

			1557 is a term: 1557_13 = 3114 = 1557*2. - _Jon E. Schoenfield_, Oct 25 2019

Crossrefs

Cf. A032558. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Oct 02 2000 and Mar 21 2001
Offset changed and Name edited by Jon E. Schoenfield, Oct 25 2019

A032558 Quotient of 'base-13' division described in A032557.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 6, 6, 6, 8, 8, 8, 8, 10, 10, 10, 13, 13, 13, 13, 16, 16
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Crossrefs

Cf. A032557. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Oct 02 2000 and Mar 21 2001
Offset changed to 1 by Jinyuan Wang, Sep 04 2021

A032559 Numbers k whose decimal representation, read as a base-14 value and divided by k, yields an integer.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 126357, 130993, 131257, 257631, 262531, 388888, 388904, 389153, 393788, 393804, 394053, 1263570, 1309930, 1312570, 2576310, 2625310, 3888880, 3889040, 3891530, 3937880, 3938040, 3940530
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Comments

Original name: Base 14 value of decimal denominator divided by this decimal value (n) is an integer.

Examples

			126357 is a term: 126357_14 = 631785 = 126357*5. - _Jon E. Schoenfield_, Oct 25 2019

Crossrefs

Cf. A032560. See also A032563 for explanation.

Extensions

Offset changed and Name edited by Jon E. Schoenfield, Oct 25 2019

A032560 Quotient of 'base-14' division described in A032559.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 9, 10, 13, 13, 14, 18, 20, 27, 28, 39
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Crossrefs

Cf. A032559. See also A032563 for explanation.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Oct 02 2000
The next term has an A032559 value > 2.4*10^11
Offset changed to 1 by Jinyuan Wang, Sep 04 2021

A032561 Numbers k whose decimal representation, read as a base-15 value and divided by k, yields an integer.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 145, 150, 295, 1450, 1500, 2950, 40885, 51535, 72385, 83035, 92850, 1064439, 1484850, 1485000, 2173239, 3279726, 3281913, 3282039, 4388526, 4390713, 5497326, 7756839, 7801192, 7801200, 8865639, 8910000, 9974439
Offset: 1

Views

Author

Patrick De Geest, Apr 15 1998

Keywords

Comments

Original name: Base 15 value of decimal denominator divided by this decimal value (n) is an integer.

Examples

			295 is a term: 295_15 = 590 = 295*2. - _Jon E. Schoenfield_, Oct 25 2019

Crossrefs

Cf. A032562. See also A032563 for explanation.

Extensions

Offset changed to 1 and Name edited by Jon E. Schoenfield, Oct 25 2019
Showing 1-10 of 26 results. Next

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

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