620060

Appears in sequences

• Expansion of 1/((1-9x)(1-11x)).at n=5A016190
• For n even a(n) = a(n-1) + 10*a(n-2), for n odd a(n) = a(n-3) + 10 a(n-2); with a(1) = 0, a(2) = 1.at n=12A161999
• First differences of A175113.at n=5A175114