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Search: id:A156615
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| A156615 |
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a(1)=2, a(n+1) is the smallest prime > n*final digit of a(n). |
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+0
6
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| 2, 3, 7, 23, 13, 17, 43, 23, 29, 83, 31, 13, 37, 97, 101, 17, 113, 53, 59, 173, 61, 23, 67, 163, 73, 79, 239, 251, 29, 263, 97, 223, 97, 233, 103, 107, 257, 263, 127, 277, 281, 43, 127, 307, 311, 47, 331, 53, 149, 443, 151, 53, 157, 373, 163, 167
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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2, 3(>2=1*2), 7 (>6=2*3), 23 (>21=3*7)
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MAPLE
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A010879 := proc(n) n mod 10 ; end:A156615 := proc(n) option remember ; if n = 1 then 2; else nextprime((n-1)*A010879(procname(n-1))) ; fi; end: L := [seq(A156615(n), n=1..80)] ;
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CROSSREFS
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Cf. A000027, A000040.
Sequence in context: A072214 A007660 A158055 this_sequence A158054 A134412 A005115
Adjacent sequences: A156612 A156613 A156614 this_sequence A156616 A156617 A156618
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KEYWORD
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nonn,base,less
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Feb 11 2009
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EXTENSIONS
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Corrected from a(2) on, corrected erroneous examples. Added keywords base,less R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 13 2009
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