456456

Appears in sequences

• a(n) = (5*n + 1)*(5*n + 2)*(5*n + 3).at n=15A001509
• a(n) = 3*n*(3*n-1)*(3*n-2).at n=26A054776
• a(n) = lcm(6n+2, 6n+4, 6n+6).at n=25A061506
• Where A098018(k)=-n.at n=30A098874
• Numbers n such that the multiplicative group modulo n is the direct product of 7 cyclic groups.at n=34A272597
• Triangle read by rows giving numbers T(n,j) (n >= 0, 1 <= j <= n+1) of certain restricted partitions of 2n into j blocks.at n=42A300051
• a(0) = 0, a(1) = 1 and a(n) = 6*a(n-1)/(n-1) + 4*a(n-2) for n > 1.at n=14A305032