121539
domain: N
Appears in sequences
- (k^2)-th k-smooth number for k = prime(n).at n=39A133581
- Numbers k such that s(k) = s(k+1), where s(k) is A059975.at n=38A327250
- Number of necklace compositions of n with no part circularly followed by a divisor.at n=39A328600
- Numbers k such that A001414(k+1) = A001414(k)+1 and A001414(k)^2+3*A001414(k)+1 is prime.at n=21A352581