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 A179708 #23 Aug 10 2019 23:34:43 %S A179708 0,7936,353792,9061376,175627264,2868264960,41731645440,559148810240, %T A179708 7048869314560,84842998005760,985278548541440,11124607890751488, %U A179708 122829335169859584,1332091026832097280,14238886515777208320,150420440721496473600,1573853022795658690560 %N A179708 Number of permutations of 1..n having exactly 5 maxima. %C A179708 Number of permutations of length n with exactly four valleys. %H A179708 Désiré André, <a href="https://doi.org/10.24033/bsmf.519">Mémoire sur les séquences des permutations circulaires</a>, Bulletin de la S. M. F., tome 23 (1895), pp. 122-184. %H A179708 R. G. Rieper and M. Zeleke, <a href="https://arxiv.org/abs/math/0005180">Valleyless Sequences</a>, arXiv:math/0005180 [math.CO], 2000. %F A179708 G.f.: 256*x^9*(31 - 788*x + 8096*x^2 - 43132*x^3 + 126072*x^4 - 192672*x^5 + 120960*x^6)/ ((1-2*x)^5*(1-4*x)^4*(1-6*x)^3*(1-8*x)^2*(1-10*x)). - _Ray Chandler_, Dec 06 2011 %Y A179708 Cf. A000079, A000431, A000487, A000517, A130661. %Y A179708 Column k=4 of A008303. %K A179708 nonn %O A179708 8,2 %A A179708 _R. H. Hardin_, Jul 25 2010 %E A179708 More terms from _Ray Chandler_, Dec 06 2011