7968032

Appears in sequences

• Number of n X 3 1..3 arrays with no element with value z exactly a city block distance of z from another element with value z.at n=13A209369
• Numbers k such that both k and sigma(k)=A000203(k) are powerful, i.e., are terms of A001694.at n=17A337044
• Indecomposable sigma-powerful numbers: powerful numbers k such that sigma(k) is also powerful, but restricted to terms that are not the product of 2 terms > 1 of A337044.at n=12A337045