193599
domain: N
Appears in sequences
- Numbers n such that core(n)=floor(sqrt(n)), where core(x)=A007913(x) is the squarefree part of x and floor(sqrt(x))=A000196(x).at n=27A069186
- Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=30A089954
- Sum(prime(k),k=1..n)^2-1.at n=16A092780
- Product of two consecutive odd numbers k, k+2 such that (k*(k+2))+-2 are primes.at n=15A174383
- a(n) = (n^2-1)^2-1.at n=21A178392
- Nonsquarefree integers m such that, for prime p, if p^k | m then 1+p^k | 1+m.at n=2A227348
- a(n) is the smallest number m such that tau(m+1) = tau(m) + n.at n=45A343018