cp's OEIS Frontend

A352281 Regular triangle read by rows, T(n,k) is the least integer m such that sigma(m)/m is greater than n + (k-1)/n.

%I A352281 #20 Apr 26 2022 07:30:58
%S A352281 2,12,36,180,720,2520,27720,110880,720720,10810800,122522400,
%T A352281 1396755360,6983776800,160626866400,4497552259200,130429015516800,
%U A352281 2021649740510400,74801040398884800,3066842656354276800,263748468446467804800,18594267025475980238400
%N A352281 Regular triangle read by rows, T(n,k) is the least integer m such that sigma(m)/m is greater than n + (k-1)/n.
%e A352281 Triangle begins:
%e A352281   2,
%e A352281   12, 36,
%e A352281   180, 720, 2520,
%e A352281   27720, 110880, 720720, 10810800,
%e A352281   122522400, 1396755360, ...
%o A352281 (PARI) isok(i,n,k) = sigma(i)/i > n+(k-1)/n;
%o A352281 T(n,k) = my(i=1); while(!isok(i,n,k), i++); i;
%Y A352281 Cf. A000203 (sigma), A004394 (supersequence), A134716 (1st column).
%K A352281 nonn,tabl
%O A352281 1,1
%A A352281 _Michel Marcus_, Apr 25 2022
%E A352281 More terms from _David A. Corneth_, Apr 25 2022