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 A006395 M2494 #29 Jun 15 2025 16:55:41 %S A006395 1,1,1,3,5,14,42,150,624,2947,15079,82607,474030,2816952,17194524, %T A006395 107226255 %N A006395 Number of unsensed planar maps with n edges and without loops or parallel edges. %C A006395 The planar maps considered here are connected. A planar map without loops or parallel edges is called simple. %D A006395 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006395 Timothy R. Walsh, <a href="http://dx.doi.org/10.1137/0604018">Generating nonisomorphic maps without storing them</a>, SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178. %Y A006395 Row sums of A384850, antidiagonal sums of A384963. %Y A006395 Cf. A006385, A006391, A006394 (sensed), A022558 (rooted), A372892 (with n vertices). %K A006395 nonn,more %O A006395 0,4 %A A006395 _N. J. A. Sloane_ %E A006395 a(9)-a(12) from _Sean A. Irvine_, Mar 30 2017 %E A006395 a(0)=1 prepended by _Andrew Howroyd_, Jan 16 2025 %E A006395 a(13)-a(15) added by _Andrew Howroyd_, Jun 15 2025