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 A000157 M1818 N0721 #30 Jan 13 2019 15:57:29 %S A000157 1,2,7,111,308063,100126976263592,131867858014413288241233435594064, %T A000157 2804519150441879896741320496043335469582478995067528608051651559815168 %N A000157 Number of Boolean functions of n variables. %D A000157 M. A. Harrison, Introduction to Switching and Automata Theory. McGraw Hill, NY, 1965, p. 153 (divided by 2). %D A000157 M. A. Harrison, The number of equivalence classes of Boolean functions under groups containing negation, IEEE Trans. Electron. Comput. 12 (1963), 559-561. %D A000157 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A000157 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A000157 Sean A. Irvine, <a href="/A000157/b000157.txt">Table of n, a(n) for n = 1..11</a> (shortened by _N. J. A. Sloane_, Jan 13 2019) %H A000157 <a href="/index/Bo#Boolean">Index entries for sequences related to Boolean functions</a> %F A000157 a(n) = A000370(n)/2. - _Sean A. Irvine_, Feb 14 2012 %Y A000157 Cf. A000370. %K A000157 nonn %O A000157 1,2 %A A000157 _N. J. A. Sloane_ %E A000157 More terms from _Sean A. Irvine_, Feb 13 2012