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 A079225 #4 Oct 17 2015 08:36:23 %S A079225 1,1,2,5,11,30,82,233,680,2033,6164,18923,58768,184045,581105,1846906, %T A079225 5905364,18980465,61292929,198758704,646974285,2113163707,6923642271, %U A079225 22749608810,74946337830,247499313730,819154110660,2716779932308 %N A079225 Number of Catalan objects fixed by four-fold application of the Catalan bijections A057511/A057512 (Deep rotation of general parenthesizations/plane trees). %F A079225 a(n) = A079216(n, 4) %p A079225 A079225 := n -> A079216bi(n,4); %Y A079225 The fourth row of A079216. The leftmost edge of the triangle A079220 and also its row sums shifted by one. Occurs in A073202 as row 2290625151. Cf. A057546, A079223-A079227. %K A079225 nonn %O A079225 0,3 %A A079225 _Antti Karttunen_ Jan 03 2002