Search: id:A161703
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%I A161703
%S A161703 1,3,5,15,41,91,173,295,465,691,981,1343,1785,2315,2941,3671,4513,5475,
%T A161703 6565,7791,9161,10683,12365,14215,16241,18451,20853,23455,26265,29291,
%U A161703 32541,36023,39745,43715,47941,52431,57193,62235,67565,73191,79121
%N A161703 (4*n^3 - 12*n^2 + 14*n + 3)/3.
%C A161703 {a(k): 0 <= k < 4} = divisors of 15:
%C A161703 a(n) = A027750(A006218(14) + k + 1), 0 <= k < A000005(15).
%H A161703 R. Zumkeller, <a href="a161700.txt">Enumerations of Divisors</a>
%F A161703 a(n) = C(n,0) + 2*C(n,1) + 8*C(n,3).
%e A161703 Differences of divisors of 15 to compute the coefficients of their interpolating 
               polynomial, see formula:
%e A161703 1 ... 3 ... 5 ... 15
%e A161703 .. 2 ... 2 .. 10
%e A161703 ..... 0 ... 8
%e A161703 ........ 8.
%Y A161703 A005408, A000124, A016813, A086514, A000125, A058331, A002522, A161701, 
               A161702, A000127, A161704, A161706, A161707, A161708, A161710, A080856, 
               A161711, A161712, A161713, A161715, A006261.
%Y A161703 Sequence in context: A138017 A148503 A145939 this_sequence A018551 A103425 
               A119472
%Y A161703 Adjacent sequences: A161700 A161701 A161702 this_sequence A161704 A161705 
               A161706
%K A161703 nonn
%O A161703 0,2
%A A161703 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 17 2009

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