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 1-7 of 7 results.

A136774 n! never ends in this many 0's in base 16.

Original entry on oeis.org

62, 94, 110, 118, 126, 158, 174, 182, 190, 206, 214, 222, 230, 238, 254, 286, 302, 310, 318, 334, 342, 350, 358, 366, 382, 398, 406, 414, 422, 430, 446, 454, 462, 478, 510, 542, 558, 566, 574, 590, 598, 606, 614, 622, 638, 654, 662, 670, 678, 686, 702, 710
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Links

Crossrefs

Cf. A000142, A136766, A136702, A000966, A055938, A096346, A136767, A136768, A136769, A136770, A136771, A136772, A136773.

Programs

  • PARI
    is(n)=my(t=4*n+2,s=1-hammingweight(n)); while(s<0, s+=valuation(t+=2,2)); s>3 \\ Charles R Greathouse IV, Sep 22 2016

Formula

Conjecture: a(n) ~ 16n. This holds with probability 1 in a random model. - Charles R Greathouse IV, Sep 22 2016

A136767 n! never ends in this many 0's in base 4.

Original entry on oeis.org

6, 10, 14, 18, 22, 29, 30, 34, 38, 45, 46, 53, 57, 61, 62, 66, 70, 77, 78, 85, 89, 93, 94, 101, 105, 109, 113, 117, 124, 125, 126, 130, 134, 141, 142, 149, 153, 157, 158, 165, 169, 173, 177, 181, 188, 189, 190, 197, 201, 205, 209, 213, 220, 221, 225, 229, 236
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Crossrefs

Cf. A000142, A136755, A136691.
Cf. A000966, A055938, A096346, A136768, A136769, A136770, A136771, A136772, A136773, A136774.

A136773 n! never ends in this many 0's in base 13.

Original entry on oeis.org

13, 27, 41, 55, 69, 83, 97, 111, 125, 139, 153, 167, 181, 182, 196, 210, 224, 238, 252, 266, 280, 294, 308, 322, 336, 350, 364, 365, 379, 393, 407, 421, 435, 449, 463, 477, 491, 505, 519, 533, 547, 548, 562, 576, 590, 604, 618, 632, 646, 660, 674, 688, 702
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Links

Crossrefs

Cf. A000142, A136763, A136699, A000966, A055938, A096346, A136767, A136768, A136769, A136770, A136771, A136772, A136774.

Programs

  • PARI
    valp(n, p)=my(s); while(n\=p, s+=n); s
is(n)=my(t=(12*n-1)\13*13+13,s=valp(t,13)-n); while(s<0, s+=valuation(t+=13, 13)); s>0 \\ Charles R Greathouse IV, Oct 19 2016

A136768 n! never ends in this many 0's in base 7.

Original entry on oeis.org

7, 15, 23, 31, 39, 47, 55, 56, 64, 72, 80, 88, 96, 104, 112, 113, 121, 129, 137, 145, 153, 161, 169, 170, 178, 186, 194, 202, 210, 218, 226, 227, 235, 243, 251, 259, 267, 275, 283, 284, 292, 300, 308, 316, 324, 332, 340, 341, 349, 357, 365, 373, 381, 389, 397
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Comments

Also: n! never ends in this many 0's in base 14, 21, 28 and all other 7-divisible proper factors of 7!

Crossrefs

Cf. A000142, A136758, A136694.
Cf. A000966, A055938, A096346, A136767, A136769, A136770, A136771, A136772, A136773, A136774.

A136770 n! never ends in this many 0's in base 9.

Original entry on oeis.org

12, 19, 32, 39, 52, 59, 66, 79, 86, 99, 106, 119, 120, 133, 140, 153, 160, 173, 180, 181, 194, 201, 214, 221, 234, 241, 248, 261, 268, 281, 288, 301, 302, 315, 322, 335, 342, 355, 362, 363, 376, 383, 396, 403, 416, 423, 430, 443, 450, 463, 470, 483, 484, 497
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Crossrefs

Cf. A000142, A136760, A136696.
Cf. A000966, A055938, A096346, A136767, A136768, A136769, A136771, A136772, A136773, A136774.

Programs

  • Mathematica
    Module[{nn=5000,zd},zd=Union[Table[Length[Last[Split[IntegerDigits[n!,9]]]],{n,nn}]];Complement[ Range[Max[zd]],zd]] (* Harvey P. Dale, Dec 26 2023 *)

A136771 n! never ends in this many 0's in base 11.

Original entry on oeis.org

11, 23, 35, 47, 59, 71, 83, 95, 107, 119, 131, 132, 144, 156, 168, 180, 192, 204, 216, 228, 240, 252, 264, 265, 277, 289, 301, 313, 325, 337, 349, 361, 373, 385, 397, 398, 410, 422, 434, 446, 458, 470, 482, 494, 506, 518, 530, 531, 543, 555, 567, 579, 591
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Crossrefs

Cf. A000142, A136761, A136697.
Cf. A000966, A055938, A096346, A136767, A136768, A136769, A136770, A136772, A136773, A136774.

A136772 n! never ends in this many 0's in base 12.

Original entry on oeis.org

7, 16, 24, 29, 33, 37, 38, 45, 51, 53, 57, 64, 69, 73, 77, 78, 87, 93, 96, 104, 105, 109, 113, 117, 124, 125, 128, 132, 141, 145, 150, 158, 159, 165, 173, 177, 181, 185, 188, 190, 194, 198, 199, 201, 212, 213, 221, 225, 230, 234, 238, 239, 244, 248, 253, 254
Offset: 1

Views

Author

Carl R. White, Jan 21 2008

Keywords

Crossrefs

Cf. A000142, A136762, A136698.
Cf. A000966, A055938, A096346, A136767, A136768, A136769, A136770, A136771, A136773, A136774.
Showing 1-7 of 7 results.

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

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