login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Numbers n with property that each sum of any k-subsequence of digits of n with k>=2 is prime.
3

%I #18 Aug 14 2013 19:25:10

%S 11,12,14,16,20,21,23,25,29,30,32,34,38,41,43,47,49,50,52,56,58,61,65,

%T 67,70,74,76,83,85,89,92,94,98,111,203,205,230,250,302,320,502,520

%N Numbers n with property that each sum of any k-subsequence of digits of n with k>=2 is prime.

%C 111 is the only number > 100 with all nonzero digits.

%e 203 is in the sequence because 2+0=2, 2+3=5, 0+3=3, 2+0+3=5 and 2,3,5 are all prime.

%Y Numbers are contained in both A028834 and A221699.

%K nonn,base,fini,full,easy

%O 1,1

%A _Derek Orr_, Jul 31 2013