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 1-2 of 2 results.

A087308 Initial terms associated with the arithmetic progressions in A086786.

Original entry on oeis.org

1, 2, 3, 5, 5, 7, 481, 635, 635, 199, 3841, 3841, 4979, 2995, 13561, 22903, 1691, 5951, 72697, 72697, 72697, 172151, 172151, 1782371, 1782371
Offset: 1

Views

Author

Amarnath Murthy, Sep 02 2003

Keywords

Links

Crossrefs

Cf. A086786, A087306, A087307, A087309, A087310.
Cf. A114664, A114671.

Extensions

More terms from David Wasserman, Jan 08 2006

A087306 a(n) is the start of the first arithmetic progression with common difference n of n numbers with the same prime signature.

Original entry on oeis.org

1, 3, 155, 111, 3875983, 1333, 763274553951, 11978
Offset: 1

Views

Author

Amarnath Murthy, Sep 02 2003

Keywords

Comments

First column of A087307; main diagonal of A114656.
a(7) > 29*10^9; a(8) = 11978.
a(n) > 10^10 for n from 9 to 11. a(12) = 120998. [From Donovan Johnson, Oct 24 2009]

Examples

			a(4) = 111 as 111, 115, 119 and 123 all are of the prime signature p*q.

Crossrefs

Cf. A087307, A114656.

Extensions

Edited and extended by David Wasserman, Jan 08 2006
a(7) from Donovan Johnson, Oct 24 2009
Showing 1-2 of 2 results.

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

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