A030756 - OEIS

%I #8 Apr 09 2020 01:33:28

%S 1,11,28,38,60,88,91,107,109,131,153,206,267,302,379,429,477,518,522,

%T 527,570,572,580,633,637,692,747,755,760,826,889,892,897,957,971,1021,

%U 1035,1041,1043,1046,1114,1115,1203,1207,1291,1362,1369,1382,1467,1469

%N Numbers k such that A030747(k)=4.

%K nonn

%O 1,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Apr 08 2020