cp's OEIS Frontend

A198292 Irregular triangle with row n being A045917(n) copies of n.

%I A198292 #10 Sep 08 2022 08:45:59
%S A198292 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,
%T A198292 15,16,16,17,17,17,17,18,18,18,18,19,19,20,20,20,21,21,21,21,22,22,22,
%U A198292 23,23,23,23,24,24,24,24,24,25,25,25,25,26,26,26,27,27,27,27,27,28,28,28
%N A198292 Irregular triangle with row n being A045917(n) copies of n.
%H A198292 Jason Kimberley, <a href="/A198292/b198292.txt">Table of i, a(i)=T(n,k)=n for n = 2..200 (i = 2..1794)</a>
%e A198292 Triangle begins:
%e A198292 2;
%e A198292 3;
%e A198292 4;
%e A198292 5, 5;
%e A198292 6;
%e A198292 7, 7;
%e A198292 8, 8;
%e A198292 9, 9;
%e A198292 10, 10;
%e A198292 11, 11, 11;
%o A198292 (Magma)
%o A198292 A182138:=func<n|[n-p:p in PrimesUpTo(n)|IsPrime(2*n-p)]>;
%o A198292 A045917:=func<n|#A182138(n)>;
%o A198292 A198292:=func<n|[n^^A045917(n)]>;
%o A198292 &cat[A198292(n):n in[1..29]];
%Y A198292 This triangle has the same dimensions as both A182138 and A184995.
%K A198292 easy,nonn,tabf
%O A198292 2,1
%A A198292 _Jason Kimberley_, Oct 03 2012