A055590
a(n) = 3^(sum of a(i) where i
0, 1, 3, 81, 35917545547686059365808220080151141317043
Offset: 0
Examples
a(3) = 3^(0+1+3) = 3^4 = 81
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.