2480437

Appears in sequences

• Number of sublattices of index n in generic 7-dimensional lattice.at n=9A038994
• Sum of divisors of 10^n.at n=6A046915
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 8.at n=9A160897
• Define a sequence {b(i), i >= 0} by b(i) = 1 for 0 <= i <= n, thereafter b(i+1) = (b(i)+b(i-n)) mod 10; consider the sequence of n-tuples [b(i-n+1), b(i-n+2),...,b(i)]; this repeats with period a(n).at n=5A256985