7119140625
domain: N
Appears in sequences
- Odd solutions of phi(sigma(k)) = sigma(phi(k)).at n=19A159939
- Squares whose arithmetic derivative is a square.at n=11A266890
- Number of set partitions of [n] such that i-j is a multiple of ten for all i,j belonging to the same block.at n=36A275077
- a(n) = Product_{k=0..n-1} n/gcd(n, A056040(k)).at n=15A294038