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 1-5 of 5 results.

A116147 Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 9.

Original entry on oeis.org

4962, 237412345332, 262912791034, 468307643502
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Comments

Also, numbers k such that k concatenated with k+6 gives the product of two numbers which differ by 7.

Examples

			4962//4960 = 7040 * 7049, where // denotes concatenation.

Crossrefs

Cf. A116140, A116146, A116153, A116278.
Cf. A116195, A116200, A116202, A116209, A116332.

Extensions

Edited by N. J. A. Sloane at the suggestion of Eric Desbiaux, Mar 23 2008

A116152 Numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 7.

Original entry on oeis.org

9, 11, 45, 18281, 32769, 56891, 180689, 330539, 959481, 1850201, 3247409, 4940219, 2425563239, 2575561739, 6003563495, 7245212645, 7770160145, 4983798265289, 5049762270381, 5534298528989, 5603798594169
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Crossrefs

Cf. A116205, A115429, A116153, A116160, A116283.

A116209 Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 7.

Original entry on oeis.org

1, 13, 41, 653, 2287, 2723, 5491, 23240971, 26823191, 60249661, 1841968537, 2009317771, 3044234903, 3258336353, 8166731261, 9481619237, 1281071245505271100098621541, 1551605670846640136726379653
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Crossrefs

Cf. A116153, A116147, A116208, A116210, A116215, A116340.

A116162 Numbers k such that k concatenated with itself gives the product of two numbers which differ by 9.

Original entry on oeis.org

2, 92, 180, 332, 486, 536, 992, 9720, 9992, 13220, 40502, 99992, 941486, 999992, 2066120, 2975202, 9999992, 77854680, 99999992, 123250136, 162423540, 243964010, 256109750, 356387462, 421110162, 542936282, 547361900
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Crossrefs

Cf. A116153, A116161, A116169, A116293.

A116284 n times n+9 gives the concatenation of two numbers m and m-1.

Original entry on oeis.org

32, 60, 804, 4778, 5214, 7406, 48208886, 51791106, 77620651, 4291816088, 4482541430, 5517458562, 5708183904, 9036996876, 9737360643, 3579205562000136225339579331, 3939042613182345526485238179
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Crossrefs

Cf. A116153, A116278, A116283, A116293.
Showing 1-5 of 5 results.

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

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