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Search: id:A049857
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| A049857 |
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Concatenate "prevprime(n)", "n" and "nextprime(n)". |
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+0
1
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| 235, 345, 357, 567, 5711, 7811, 7911, 71011, 71113, 111213, 111317, 131417, 131517, 131617, 131719, 171819, 171923, 192023, 192123, 192223, 192329, 232429, 232529, 232629, 232729, 232829, 232931, 293031, 293137, 313237
(list; graph; listen)
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OFFSET
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3,1
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MAPLE
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P:=proc(i) local a, n; for n from 3 by 1 to i do a:=prevprime(n)*10^floor(evalf(log10(nextprime(n))+1, 100)+floor(evalf(log10(n)+1, 100)))+n*10^floor(evalf(log10(nextprime(n))+1, 100))+nextprime(n); print(a); od; end: P(100); [From Paolo P. Lava (ppl(AT)spl.at), Jan 21 2009]
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CROSSREFS
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Sequence in context: A101218 A036209 A077803 this_sequence A132903 A147148 A097487
Adjacent sequences: A049854 A049855 A049856 this_sequence A049858 A049859 A049860
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KEYWORD
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nonn,base
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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