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 A339495 #11 Dec 08 2020 02:31:37 %S A339495 1,3,9,19,37,73,144,283,556,1093,2149,4225,8306,16329,32102,63111, %T A339495 124073,243921,479536,942743,1853384,3643657,7163241,14082561, %U A339495 27685586,54428429,107003474,210363291,413563341,813044121,1598402656,3142376883,6177750292,12145137293 %N A339495 Row sums of A339494. %H A339495 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (1,1,1,1,1). %F A339495 a(n) = A339493(n) + Fibonacci(n + 2) for n >= 2. %F A339495 a(n) = [x^n] -x*(x*(x + 1)*(x*(x*(x*(x*(x + 2) + 2) + 3) + 3) + 2) + 1)/(x^5 + x^4 + x^3 + x^2 + x - 1). %Y A339495 Cf. A339494, A339493, A000045, A333650. %K A339495 nonn %O A339495 1,2 %A A339495 _Peter Luschny_, Dec 07 2020