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Search: id:A107836
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| A107836 |
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Slowest increasing sequence where a(n)+(first digit of a(n)) is prime. |
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+0
3
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| 1, 10, 12, 16, 18, 21, 27, 29, 34, 38, 43, 49, 54, 56, 61, 65, 67, 72, 76, 81, 89, 92, 94, 98, 100, 102, 106, 108, 112, 126, 130, 136, 138, 148, 150, 156, 162, 166, 172, 178, 180, 190, 192, 196, 198, 209, 221, 225, 227, 231, 237, 239, 249, 255, 261, 267, 269, 275
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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(10)+1=11, which is prime; (12)+1=13=prime; (16)+1=17=prime;
(21)+2=23=prime; etc.
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MATHEMATICA
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Select[ Range[280], PrimeQ[ # + IntegerDigits[ # ][[1]]] &] (from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 14 2005)
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CROSSREFS
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Sequence in context: A072198 A057485 A162825 this_sequence A096128 A063192 A109604
Adjacent sequences: A107833 A107834 A107835 this_sequence A107837 A107838 A107839
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KEYWORD
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base,easy,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)kntv.be), Jun 11 2005
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EXTENSIONS
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Edited, corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 14 2005
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