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A198292
Irregular triangle with row n being A045917(n) copies of n.
4
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
OFFSET
2,1
EXAMPLE
Triangle begins:
2;
3;
4;
5, 5;
6;
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
KEYWORD
easy,nonn,tabf
AUTHOR
Jason Kimberley, Oct 03 2012
STATUS
approved