381888

Appears in sequences

• a(n) = (n+1)*binomial(n+7, 7).at n=11A056001
• Expansion of (1-x)^(-1)/(1-2*x-3*x^2-3*x^3).at n=11A077825
• Numbers k such that k and k^2 use only the digits 1, 3, 4, 5 and 8.at n=9A137022
• a(n) = Sum_{i=0..n} i*Fibonacci(i)^2.at n=12A282464
• Number of well-formed formulas of length n in a formal propositional language with one unitary operator, one binary operator, and one propositional variable.at n=37A308616
• Numbers m such that A049417(A049417(m)) = k*m for some k where A049417 is the infinitary sigma function.at n=25A318182