The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A090321

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A090321

T(n,k) = prime(n+1) - prime(n-k+1), 1<=k<=n, triangular array read by rows.
(history; published version)

#5 by R. J. Mathar at Sat Sep 15 14:44:56 EDT 2012

STATUS

editing

approved

#4 by R. J. Mathar at Sat Sep 15 14:44:37 EDT 2012

COMMENTS

T(n,1) = A001223(n); T(n,n) = A040976(n).

Row-reversed A086800. - R. J. Mathar, Sep 15 2012

FORMULA

T(n,1) = A001223(n); T(n,n) = A040976(n).

EXAMPLE

1;

2, 3;

2, 4, 5;

4, 6, 8, 9;

2, 6, 8, 10, 11;

4, 6, 10, 12, 14, 15;

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 18:50:42 EDT 2012

AUTHOR

_Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), _, Jan 26 2004

Discussion

Fri Mar 30

18:50

OEIS Server: https://oeis.org/edit/global/246

#2 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

nonn,tabl,new

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystemsgmail.com), Jan 26 2004

#1 by N. J. A. Sloane at Thu Feb 19 03:00:00 EST 2004

NAME

T(n,k) = prime(n+1) - prime(n-k+1), 1<=k<=n, triangular array read by rows.

DATA

1, 2, 3, 2, 4, 5, 4, 6, 8, 9, 2, 6, 8, 10, 11, 4, 6, 10, 12, 14, 15, 2, 6, 8, 12, 14, 16, 17, 4, 6, 10, 12, 16, 18, 20, 21, 6, 10, 12, 16, 18, 22, 24, 26, 27, 2, 8, 12, 14, 18, 20, 24, 26, 28, 29, 6, 8, 14, 18, 20, 24, 26, 30, 32, 34, 35, 4, 10, 12, 18, 22, 24, 28, 30, 34, 36, 38

OFFSET

1,2

COMMENTS

T(n,1) = A001223(n); T(n,n) = A040976(n).

LINKS

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PrimeDifferenceFunction.html">Prime Difference Function</a>

CROSSREFS

Cf. A000040.

KEYWORD

nonn,tabl

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jan 26 2004

STATUS

approved