169290
domain: N
Appears in sequences
- Degrees of irreducible representations of O'Nan group ON.at n=20A003919
- Degrees of irreducible representations of O'Nan group ON.at n=21A003919
- Numbers k such that phi(k) = Sum_{d|k} core(d) where core(x) is the squarefree part of x (A007913).at n=22A074786
- Number of regions in an equilateral triangle "frame" of size n.at n=23A328526