210901

Properties

Appears in sequences

• First member of a prime quadruple in a p^2+p-1 progression.at n=16A057325
• a(n) = (Sum_{k=1..A047380(n)} k^6) / (Sum_{k=1..A047380(n)} k^2).at n=15A133180
• a(n) = 373 + 1947*n + 3780*n^2 + 3234*n^3 + 1029*n^4.at n=3A134161
• Number of 3-divided binary sequences (or words) of length n.at n=17A210109
• Prime numbersat n=18883