909090909091
domain: N
Appears in sequences
- a(n) = (1 - (-10)^n)/11.at n=12A014992
- Gaussian binomial coefficient [ n,12 ] for q=-10.at n=1A015433
- a(n) = 9*a(n-1) + 10*a(n-2).at n=13A015585
- Cyclotomic polynomials at x=-10.at n=13A020509
- 1+integers repeating "90" decimal digit pattern.at n=6A095372
- Numbers m which when sandwiched between two 1's give a multiple of m.at n=17A116436
- Numbers k which when sandwiched between two 7's give a multiple of k.at n=30A116442
- a(n) = Sum_{j=0..12} (-n)^j.at n=10A266229