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 1-4 of 4 results.

A082253 Concatenation of (5n-4), (5n-3), (5n-2), (5n-1) and 5n divided by 5.

Original entry on oeis.org

2469, 135782, 222426283, 323436384, 424446485, 525456586, 626466687, 727476788, 828486889, 929496990, 1030507091, 1131517192, 1232527293, 1333537394, 1434547495, 1535557596, 1636567697, 1737577798, 1838587899, 19395979820, 20220420620821, 21221421621822
Offset: 1

Views

Author

Amarnath Murthy, Apr 11 2003

Keywords

Examples

			a(3) = 1112131415/5 = 222426283.

Links

Crossrefs

Cf. A082251, A082252, A082254, A082255, A082256.

Programs

  • PARI
    a(n)={fromdigits(concat(vector(5, k, digits(5*(n-1)+k))))/5} \\ Andrew Howroyd, Nov 09 2019

Extensions

Terms a(12) and beyond from Andrew Howroyd, Nov 09 2019

A082254 Concatenation of (6n-5), (6n-4), (6n-3), (6n-2), (6n-1) and 6n divided by 6.

Original entry on oeis.org

20576, 131516852, 21902526953, 32003537054, 42104547155, 52205557256, 62306567357, 72407577458, 82508587559, 92609597660, 102710607761, 112811617862, 122912627963, 133013638064, 143114648165, 153215658266, 163316516683517, 17184017517684518, 18185018518685519
Offset: 1

Views

Author

Amarnath Murthy, Apr 11 2003

Keywords

Examples

			a(3) = 131415161718/6 = 21902526953.

Links

Crossrefs

Cf. A074996, A082251, A082252, A082253, A082255, A082256.

Programs

  • PARI
    a(n)={fromdigits(concat(vector(6, k, digits(6*(n-1)+k))))/6} \\ Andrew Howroyd, Nov 09 2019

Extensions

Terms a(8) and beyond from Andrew Howroyd, Nov 09 2019

A082255 Integer part of (concatenation of (8n-3), (8n-2), (8n-1), (8n), (8n+1), (8n+2), (8n+3), (8n+4) divided by 8).

Original entry on oeis.org

7098637639, 164268952147740, 265279053157841, 366289154167942, 467299255178043, 568309356188144, 669319457198245, 770329558208346, 871339659218447, 972349760228548, 1073359861238649, 11743699622487387
Offset: 1

Views

Author

Amarnath Murthy, Apr 11 2003

Keywords

Comments

The concatenation is divisible by 8 (and so no "floor" is necessary) for 1 <= n <= 11. - R. Piyo (nagoya314(AT)yahoo.com), Dec 11 2004

Examples

			a(3) = 2122232425262728/8 = 265279053157841.

Crossrefs

Cf. A082251, A082252, A082253, A082254, A082256.

Programs

  • Mathematica
    Floor[(FromDigits[Flatten[IntegerDigits[#]]])/8]&/@Table[8n+k,{n,12}, {k,-3,4}] (* Harvey P. Dale, Jul 30 2011 *)

Extensions

More terms from Joshua Zucker, May 03 2006

A082256 (Concatenation of 9n-8, 9n-7, 9n-6, 9n-5, 9n-4, 9n-3, 9n-2, 9n-1 and 9n) divided by 9.

Original entry on oeis.org

13717421, 11234681268351302, 21335691369361403, 31436701470371504, 41537711571381605, 51638721672391706, 61739731773401807, 71840741874411908, 81941751975422009, 92042762076432110
Offset: 1

Views

Author

Amarnath Murthy, Apr 11 2003

Keywords

Examples

			a(3) = 192021222324252627/9 = 21335691369361403.

Crossrefs

Cf. A082251, A082252, A082253, A082254, A082255.

Programs

  • Mathematica
    Table[FromDigits[Flatten[Table[IntegerDigits[9*n -i], {i, 8, 0, -1}]]]/9, {n, 1, 20}] (* Stefan Steinerberger, Dec 30 2007 *)

Extensions

More terms from Stefan Steinerberger, Dec 30 2007
Showing 1-4 of 4 results.

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

Content is available under The OEIS End-User License Agreement.