71568
domain: N
Appears in sequences
- Numbers k such that phi(k) = Sum_{d|k} core(d) where core(x) is the squarefree part of x (A007913).at n=19A074786
- Sum of the cubes of the first n cubefree numbers.at n=21A114286
- Number of partitions p of n such that (number of even numbers in p) is a part of p.at n=46A241544
- a(n) = 140*2^n - 112.at n=9A305270