22747
domain: N
Appears in sequences
- a(n) = (2*n - 3)n^2.at n=23A015238
- Discriminants of totally complex sextic fields (negated).at n=18A023687
- Position of 7^n among 7-smooth numbers (A002473).at n=16A232093
- Positive integers m with 2^(m-1)*phi(m) - 1 prime, where phi(.) is Euler's totient function.at n=31A236375
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 299", based on the 5-celled von Neumann neighborhood.at n=31A271154
- Numbers m such that abs(K(m+1) - K(m)) = 1, where K(m) = A002034(m) is the Kempner function.at n=25A346211
- Radicands of pure cubic number fields of type BETA and subtype M0.at n=25A363699
- Numbers k such that sigma(k) = psi(k) + tau(k)^2 + omega(k)^3.at n=15A392520