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A227823 Numbers n with property that each sum of any k-subsequence of digits of n with k>=2 is prime. 3
11, 12, 14, 16, 20, 21, 23, 25, 29, 30, 32, 34, 38, 41, 43, 47, 49, 50, 52, 56, 58, 61, 65, 67, 70, 74, 76, 83, 85, 89, 92, 94, 98, 111, 203, 205, 230, 250, 302, 320, 502, 520 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
111 is the only number > 100 with all nonzero digits.
LINKS
EXAMPLE
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.
CROSSREFS
Numbers are contained in both A028834 and A221699.
Sequence in context: A247849 A088134 A221699 * A332379 A140353 A108662
KEYWORD
nonn,base,fini,full,easy
AUTHOR
Derek Orr, Jul 31 2013
STATUS
approved

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Last modified May 27 15:55 EDT 2024. Contains 372880 sequences. (Running on oeis4.)