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Search: id:A038394
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| A038394 |
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Concatenate first n primes in reverse order. |
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+0
3
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| 2, 32, 532, 7532, 117532, 13117532, 1713117532, 191713117532, 23191713117532, 2923191713117532, 312923191713117532, 37312923191713117532, 4137312923191713117532
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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F. Smarandache, Sequences of Numbers Involved in Unsolved Problems, Hexis, Phoenix, 2006.
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LINKS
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M. Bencze and L. Tutescu, editors, Some Notions and Questions in Number Theory, Vol. II.
M. L. Perez et al., eds., Smarandache Notions Journal
M. Fleuren, Smarandache Back Concatenated Primes.
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems.
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MAPLE
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P:=proc(i) local a, n; a:=2; print(a); for n from 2 by 1 to i do a:=a+ithprime(n)*10^floor(evalf((log10(a)+1), 100)); 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: A010045 A052151 A092844 this_sequence A068110 A009517 A069182
Adjacent sequences: A038391 A038392 A038393 this_sequence A038395 A038396 A038397
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KEYWORD
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nonn,base
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AUTHOR
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M.I.Petrescu (mipetrescu(AT)yahoo.com)
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