A120661 Trajectory of 7 under map "replace k with concatenation of anti-divisors of k".
7, 235, 237106794157, 23515118109417094519614036454677229711469381810493772727748015786693526280375184463161423922194842717663158071196105
Offset: 1
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.