A198292 - OEIS

A198292

Irregular triangle with row n being A045917(n) copies of n.

2, 3, 4, 5, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 15, 15, 15, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 27, 28, 28, 28

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

LINKS

Jason Kimberley, Table of i, a(i)=T(n,k)=n for n = 2..200 (i = 2..1794)

EXAMPLE

Triangle begins:

5, 5;

7, 7;

8, 8;

9, 9;

10, 10;

11, 11, 11;

PROG

(Magma)

A182138:=func<n|[n-p:p in PrimesUpTo(n)|IsPrime(2*n-p)]>;

A045917:=func<n|#A182138(n)>;

A198292:=func<n|[n^^A045917(n)]>;

&cat[A198292(n):n in[1..29]];

CROSSREFS

This triangle has the same dimensions as both A182138 and A184995.

Sequence in context: A202306 A373178 A275579 * A020892 A196165 A356990

Adjacent sequences: A198289 A198290 A198291 * A198293 A198294 A198295

KEYWORD

easy,nonn,tabf

AUTHOR

Jason Kimberley, Oct 03 2012

STATUS

approved