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A235176 Numbers k such that the sum of the first k refactorable numbers (A033950) is also a refactorable number. 2

%I

%S 1,47,125,131,185,187,189,191,198,201,204,206,256,257,262,264,268,276,

%T 283,285,294,800,809,812,818,822,824,827,829,840,844,848,1076,1080,

%U 1118,1119,1133,1135,1151,1153,1164,1171,1175,1183,1186,1189,1195,1208,1210

%N Numbers k such that the sum of the first k refactorable numbers (A033950) is also a refactorable number.

%H Giovanni Resta, <a href="/A235176/b235176.txt">Table of n, a(n) for n = 1..1000</a>

%e The sum of the first 47 terms of A033950 equals 9120, which is A033950(616).

%Y Cf. A033950, A235177.

%K nonn

%O 1,2

%A _Ivan N. Ianakiev_, Jan 04 2014

%E a(8)-a(49) from _Giovanni Resta_, Jan 04 2014

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Last modified May 21 05:07 EDT 2022. Contains 353887 sequences. (Running on oeis4.)