A117928 - OEIS

%I #6 Nov 23 2020 17:07:07

%S 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 71,89,107,131,19,41,59,79,103,139,139,173,23,47,71,101,127,163,167,

%U 191,223,29,59,89,131,149,179,227,239,269,317,31,67,97,127,163,191,223,269

%N 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 T(n,0) = A000040(n); T(n,1) = A059786(n) for n>1.

%H Robert Israel, <a href="/A117928/b117928.txt">Table of n, a(n) for n = 1..10011</a>(rows 1 to 141, flattened)

%p T:= proc(n,k) local x;

%p   for x from (k+1)*ithprime(n) by k do

%p     if isprime(x) then return x fi

%p   od

%p end proc:

%p for n from 1 to 10 do

%p   seq(T(n,k),k=0..n-1)

%p od; # _Robert Israel_, Nov 23 2020

%K nonn,tabl

%O 1,1

%A _Reinhard Zumkeller_, Apr 03 2006