Search: id:A001039
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%I A001039 M2964 N1199
%S A001039 3,13,781,137257,28531167061,25239592216021,51702516367896047761,
%T A001039 109912203092239643840221,949112181811268728834319677753,
%U A001039 91703076898614683377208150526107718802981
%N A001039 a(n) = (p^p-1)/(p-1) where p = prime(n).
%D A001039 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001039 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001039 W. F. Lunnon et al., Arithmetic properties of Bell numbers to a composite 
               modulus I, Acta Arith., 35 (1979), 1-16. [From N. J. A. Sloane (njas(AT)research.att.com), 
               Feb 07 2009]
%D A001039 T. S. Motzkin, Sorting numbers ...: for a link to this paper see A000262.
%D A001039 T. S. Motzkin, Sorting numbers for cylinders and other classification 
               numbers, in Combinatorics, Proc. Symp. Pure Math. 19, AMS, 1971, 
               pp. 167-176.
%D A001039 J. Levine and R. E. Dalton, Minimum periods, modulo p, of first-order 
               Bell exponential integers, Math. Comp., 16 (1962), 416-423.
%H A001039 T. D. Noe, <a href="b001039.txt">Table of n, a(n) for n=1..26</a>
%p A001039 for i from 1 to 20 do printf(`%d,`,(ithprime(i)^ithprime(i) -1)/(ithprime(i)-1)) 
               od:
%t A001039 Table[(Prime[n]^Prime[n] - 1)/(Prime[n] - 1), {n, 1, 10}]
%Y A001039 Cf. A054767.
%Y A001039 Sequence in context: A066266 A092845 A089711 this_sequence A065831 A092540 
               A118628
%Y A001039 Adjacent sequences: A001036 A001037 A001038 this_sequence A001040 A001041 
               A001042
%K A001039 nonn,easy
%O A001039 1,1
%A A001039 N. J. A. Sloane (njas(AT)research.att.com).
%E A001039 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jul 10 2000

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