220028

Appears in sequences

• Expansion of (1-x)/(1 - x - x^3 - 2*x^4 + 2*x^5).at n=30A052914
• a(1) = 2. For n>1, a(n) = smallest m such that m == 0 (mod prime(n)), m + 1 == 0 (mod prime(n+1)) and m-1 == 0 (mod prime(n-1)).at n=18A078455