2165130

Appears in sequences

• A traffic light problem: expansion of 2/(1 - 3*x)^3.at n=9A006043
• a(n) = (n+1)*(n+2)*(n+9)*3^n/18.at n=9A080421
• a(n) = binomial(n + 7, 7)*9^n.at n=4A173192
• Numbers k such that k, A001414(k) and A083345(k) are all multiples of 3, where A001414 is fully additive with a(p) = p, and A083345 is the numerator of the fully additive function with a(p) = 1/p.at n=18A373476