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.

A116233 n times n+2 gives the concatenation of two numbers m and m-8.

Original entry on oeis.org

12, 3656544, 4565635, 5434364, 6343455, 3646962589704198388, 6353037410295801611, 9101508044249652934, 7903999111431765764698711045777, 9722180929613583946516892863959
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Examples

			6343455 * 6343457 = 4023943//4023935, where // denotes
concatenation.
		

Crossrefs

A116095 Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 2.

Original entry on oeis.org

2137, 2892, 6369, 12217, 21964, 28233, 42312, 4978977, 9571608, 18642249, 32288908, 96039609, 200037461217, 305526508312, 570666416233, 638912248204, 996003996009, 1846991026584, 3251664327537, 4859838227992
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Comments

If k-9 and k-8 have the same number of decimal digits, and k is in A115435, it also is in this sequence (and vice versa). - R. J. Mathar, Aug 09 2010

Examples

			96039609//96039600 = 97999800 * 97999802, where // denotes
concatenation.
		

Crossrefs

A116227 n times n+4 gives the concatenation of two numbers m and m-9.

Original entry on oeis.org

44, 53, 949949, 979652, 7771781677, 7900890078, 9920892098, 9949999499, 38773083432315, 41534158410840, 47433813119406, 52566186880591, 58465841589157, 61226916567682, 72258945037433, 86156896546723
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Crossrefs

A116225 n times n+1 gives the concatenation of two numbers m and m-9.

Original entry on oeis.org

12, 878, 969, 4582271, 5417729, 7235911, 7365332534826384966, 8274423443917294057, 3818527786666305707333509337803, 6181472213333694292666490662197, 7454891423029942070969872974167
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Examples

			7235911 * 7235912 = 5235841//5235832, where // denotes
concatenation.
		

Crossrefs

Showing 1-4 of 4 results.