Search: id:A006004
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%I A006004 M3412
%S A006004 1,4,11,25,49,86,139,211,305,424,571,749,961,1210,1499,
%T A006004 1831,2209,2636,3115,3649,4241,4894,5611,6395,7249,8176,
%U A006004 9179,10261,11425,12674,14011,15439,16961,18580,20299,22121
%N A006004 C(n+2,3)+C(n,3)+C(n-1,3).
%C A006004 Equals binomial transform of [1, 3, 4, 3, 0, 0, 0,...]. Example: a(4) 
               = 25 = (1, 3, 3, 1) dot (1, 3, 4, 3) = (1 + 9 + 12 + 3). - Gary W. 
               Adamson (qntmpkt(AT)yahoo.com), Jul 25 2008
%D A006004 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006004 S. M. Losanitsch, Die Isomerie-Arten bei den Homologen der Paraffin-Reihe, 
               Chem. Ber. 30 (1897), 1917-1926.
%H A006004 T. D. Noe, <a href="b006004.txt">Table of n, a(n) for n=1..1000</a>
%F A006004 (n^3-2n^2+5n-2)/2.
%Y A006004 Sequence in context: A115294 A110610 A051462 this_sequence A006522 A036837 
               A011851
%Y A006004 Adjacent sequences: A006001 A006002 A006003 this_sequence A006005 A006006 
               A006007
%K A006004 nonn,easy,nice
%O A006004 1,2
%A A006004 N. J. A. Sloane (njas(AT)research.att.com).

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