This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A006173 M0174 #27 Nov 03 2017 22:18:36
%S A006173 2,1,4,13,44,135,472,1492,5324,17405,63944,215096,799416,2752909,
%T A006173 10310384,36443256,137263244,489166324,1860249448,6739795717,
%U A006173 25596173800,93596253769,357974884304,1319325363658,5056389932088
%N A006173 Witt vector *2!.
%C A006173 If c is the Witt transform of b then b(n) = Sum_{d|n} A074650(n/d, c(d)).
%C A006173 The Somos transform sends sequence {a(n)} to sequence with g.f. Product_{i=1..n} 1/(1-a(i)*x^i).
%D A006173 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A006173 H. Gaudier, <a href="http://www.emis.de/journals/SLC/opapers/s18gaudier.html">Relèvement des coefficients binomiaux dans les vecteurs de Witt</a>, Séminaire Lotharingien de Combinatoire. Institut de Recherche Math. Avancée, Université Louis Pasteur, Strasbourg, Actes 16 (1988), 358/S-18, pp. 93-108.
%H A006173 H. Gaudier, <a href="/A006173/a006173.pdf">Relèvement des coefficients binomiaux dans les vecteurs de Witt</a>, Séminaire Lotharingien de Combinatoire. Institut de Recherche Math. Avancée, Université Louis Pasteur, Strasbourg, Actes 16 (1988), 358/S-18, pp. 93-107. (Annotated scanned copy)
%F A006173 Inverse Somos transform of A000108 shifted left. - _Wouter Meeussen_, Aug 20 2002
%F A006173 Witt transform of A060165. - _Sean A. Irvine_, Jan 15 2017
%Y A006173 Cf. A006177, A006973.
%K A006173 nonn
%O A006173 1,1
%A A006173 _Simon Plouffe_
%E A006173 Edited by _Christian G. Bower_, Aug 20 2002