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A028834
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Numbers n such that sum of digits of n is a prime.
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19
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2, 3, 5, 7, 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, 101, 102, 104, 106, 110, 111, 113, 115, 119, 120, 122, 124, 128, 131, 133, 137, 139, 140, 142, 146, 148, 151, 155, 157, 160, 164, 166, 173, 175, 179, 182
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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MAPLE
| a:=proc(n) local nn: nn:=convert(n, base, 10): if isprime(sum(nn[j], j=1..nops(nn)))=true then n else fi end: seq(a(n), n=1..200); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 17 2007
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MATHEMATICA
| Select[Range[200], PrimeQ[Total[IntegerDigits[#]]]&] (* From Harvey P. Dale, Feb 18 2011 *)
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PROG
| (Haskell)
a028834 n = a028834_list !! (n-1)
a028834_list = filter ((== 1) . a010051 . a007953) [1..]
-- Reinhard Zumkeller, Nov 13 2011
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CROSSREFS
| Cf. A007953, A028835, A028842, A052018, A052019, A052020, A052021, A052022.
Cf. A010051; A046704 is a subsequence.
Sequence in context: A073085 A119251 A028835 * A139750 A139749 A178357
Adjacent sequences: A028831 A028832 A028833 * A028835 A028836 A028837
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KEYWORD
| nonn,base,easy,nice
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AUTHOR
| Armand Turpel (armand(AT)vo.lu, armand_t(AT)geocities.com)
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EXTENSIONS
| More terms from Scott Lindhurst (ScottL(AT)alumni.princeton.edu)
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