144441
domain: N
Appears in sequences
- LookAndSay(n) is palindromic.at n=20A079676
- Expansion of x*(11 + 22*x + 20*x^2)/((1-x)*(1+x)*(1 - 10*x^2)).at n=9A094620
- Expansion of x*(11+13*x+20*x^2) / ( (x-1)*(1+x)*(10*x^2-1) ).at n=9A094621
- Expansion of x*(11+20*x)/((1-x)*(1-10*x^2)).at n=9A094622
- 1 concatenated with n n's concatenated with 1.at n=3A137465
- Numbers such that each decimal digit d (for all d in the range 1 <= d <= 9) occurs only in runs of length exactly d.at n=19A140057
- a(n) = n 4's sandwiched between two 1's.at n=4A205084