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 A006297 M4740 #24 Jul 08 2025 16:46:36 %S A006297 1,10,167,1720,24164,256116,3392843,36703824,472592916,5188948072, %T A006297 65723863196,729734918432,9145847808784,102432266545800, %U A006297 1274461449989715,14373136466094880,177882700353757460,2017523504473479992,24868664942648145372 %N A006297 Number of rooted genus-1 maps with n edges. %D A006297 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %D A006297 T. R. S. Walsh, Combinatorial Enumeration of Non-Planar Maps. Ph.D. Dissertation, Univ. of Toronto, 1971. %H A006297 T. R. S. Walsh and A. B. Lehman, <a href="http://dx.doi.org/10.1016/0095-8956(72)90056-1">Counting rooted maps by genus</a>, J. Comb. Thy B13 (1972), 122-141 and 192-218. %H A006297 <a href="/A007401/a007401_1.pdf">Notes</a> %Y A006297 Row maxima of A269921. %K A006297 nonn %O A006297 2,2 %A A006297 _N. J. A. Sloane_ %E A006297 More terms from _Sean A. Irvine_, Feb 24 2017