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A090823
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a(n)=(3/2)*(1/p)*(2*p+1)*(3^p+1)*B(2*p) where p=prime(n) and where B(k) denotes the k-th Bernoulli number.
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0
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61, 8205, 3440347021, 7080447489597, 171336855102372210685, 1747517658865390518778893, 610345691966794096778276272763149, 49983985045539556672075839852554462798428935229
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OFFSET
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3,1
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COMMENTS
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a(n)==1 mod (prime(n))
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LINKS
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MATHEMATICA
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Table[p=Prime[n]; 3/(2p) (2p+1)(3^p+1)BernoulliB[2p], {n, 3, 10}] (* Harvey P. Dale, Aug 21 2013 *)
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PROG
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(PARI) a(n)=3/2/prime(n)*(2*prime(n)+1)*(3^prime(n)+1)*bernfrac(2*prime(n))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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