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A117928 Triangle read by rows: T(n,k) = smallest prime of the form (k+1)*prime(n) + k*i for some i>0, 0<=k

%I A117928 #6 Nov 23 2020 17:07:07
%S A117928 2,3,7,5,11,17,7,17,23,31,11,23,37,47,59,13,29,41,61,73,83,17,37,53,
%T A117928 71,89,107,131,19,41,59,79,103,139,139,173,23,47,71,101,127,163,167,
%U A117928 191,223,29,59,89,131,149,179,227,239,269,317,31,67,97,127,163,191,223,269
%N A117928 Triangle read by rows: T(n,k) = smallest prime of the form (k+1)*prime(n) + k*i for some i>0, 0<=k<n.
%C A117928 T(n,0) = A000040(n); T(n,1) = A059786(n) for n>1.
%H A117928 Robert Israel, <a href="/A117928/b117928.txt">Table of n, a(n) for n = 1..10011</a>(rows 1 to 141, flattened)
%p A117928 T:= proc(n,k) local x;
%p A117928   for x from (k+1)*ithprime(n) by k do
%p A117928     if isprime(x) then return x fi
%p A117928   od
%p A117928 end proc:
%p A117928 for n from 1 to 10 do
%p A117928   seq(T(n,k),k=0..n-1)
%p A117928 od; # _Robert Israel_, Nov 23 2020
%K A117928 nonn,tabl
%O A117928 1,1
%A A117928 _Reinhard Zumkeller_, Apr 03 2006