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 A385208 #11 Jun 21 2025 11:50:21 %S A385208 1,7,245,11319,593047,33429123,1977326743,121034349975,7601257418678, %T A385208 487008549508481,31705597390195820,2091361378163375955, %U A385208 139468121325692304390,9387480337647754305649,636914947847207765431080,43512658997082838985965655,2990750175103769856729417627 %N A385208 G.f. A(x) satisfies A(x) = ( 1 + 49*x*A(x)^8 )^(1/7). %F A385208 a(n) = 49^n * binomial(8*n/7+1/7,n)/(8*n+1). %F A385208 G.f. A(x) satisfies A(x) = 1/A(-x*A(x)^9). %F A385208 G.f.: ( (1/x) * Series_Reversion(x/(1+49*x)^(8/7)) )^(1/8). %o A385208 (PARI) a(n) = 49^n*binomial(8*n/7+1/7, n)/(8*n+1); %Y A385208 Cf. A078531, A078532, A078533, A078534, A078535. %Y A385208 Cf. A385206, A385207. %K A385208 nonn %O A385208 0,2 %A A385208 _Seiichi Manyama_, Jun 21 2025