281080

Appears in sequences

• Expansion of g.f. x^3/(1 - 2*x + x^3 - x^4).at n=20A059633
• (prime(n))^3-(nonprime(n))^3 .at n=18A163121
• a(0) = 1, a(n) = Sum_{k=1..n} a(n-k)*ceiling(sin(k)).at n=21A265826