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Search: id:A092595
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| A092595 |
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Numbers n such that sum of decimal digits of n and n+1 are both prime numbers, i.e. both n and n+1 are in A028834. |
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+0
1
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| 2, 11, 20, 29, 49, 101, 110, 119, 139, 199, 200, 209, 229, 289, 319, 379, 409, 469, 559, 649, 739, 829, 919, 1001, 1010, 1019, 1039, 1099, 1100, 1109, 1129, 1189, 1219, 1279, 1309, 1369, 1459, 1549, 1639, 1729, 1819, 1909, 2000, 2009, 2029, 2089, 2119, 2179
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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n=4429, sam[n]=4+4+2+9=19, sam[n+1]=4+4+3+0=11.
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MATHEMATICA
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t=Table[0, {256}]; j=1; Do[s=Apply[Plus, IntegerDigits[n]]; s1=Apply[Plus, IntegerDigits[n+1]]; If[PrimeQ[s]&&PrimeQ[s1], Print[n]; t[[j]]=n; j=j+1], {n, 1, 10000}]; t
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CROSSREFS
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Cf. A028834.
Sequence in context: A105076 A067670 A017185 this_sequence A116990 A064975 A115095
Adjacent sequences: A092592 A092593 A092594 this_sequence A092596 A092597 A092598
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KEYWORD
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base,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Mar 17 2004
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