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 A233335 #11 Jul 04 2015 12:20:59 %S A233335 1,1,2,7,38,292,2975,38350,604433,11351659,249042701,6283114723, %T A233335 179995680530,5794486077958,207806806310354,8241414107222095, %U A233335 359171801820266717,17107537203463252273,886296777786378900077,49732564234138336160086,3011177123882906437153214,196063383282648338166793297 %N A233335 E.g.f. A(x) satisfies: A( Integral 1/A(x) dx ) = exp(x). %H A233335 Paul D. Hanna, <a href="/A233335/b233335.txt">Table of n, a(n) for n = 0..160</a> %F A233335 E.g.f. satisfies: A(x) = exp( Series_Reversion( Integral 1/A(x) dx ) ). %F A233335 E.g.f.: exp(G(x)) where G(x) = exp(G(G(x))) is the e.g.f. of A214645. %e A233335 E.g.f.: A(x) = 1 + x + 2*x^2/2! + 7*x^3/3! + 38*x^4/4! + 292*x^5/5! + 2975*x^6/6! +... %e A233335 Related expansions. %e A233335 Integral 1/A(x) dx = x - x^2/2! - x^4/4! - 6*x^5/5! - 52*x^6/6! - 591*x^7/7! - 8404*x^8/8! +... %e A233335 The series reversion of Integral 1/A(x) dx equals log(A(x)) and begins: %e A233335 log(A(x)) = x + x^2/2! + 3*x^3/3! + 16*x^4/4! + 126*x^5/5! + 1333*x^6/6! + 17895*x^7/7! + 293461*x^8/8! +...+ A214645(n)*x^n/n! +... %e A233335 and equals the e.g.f. of A214645. %o A233335 (PARI) {a(n)=local(A=1+x+x*O(x^n));for(i=1,n,A=exp(serreverse(intformal(1/A+x*O(x^n)))));n!*polcoeff(A,n)} %o A233335 for(n=0,30,print1(a(n),", ")) %Y A233335 Cf. A233336, A214645 (log). %K A233335 nonn %O A233335 0,3 %A A233335 _Paul D. Hanna_, Dec 07 2013