541201

Properties

Appears in sequences

• a(n+5) = a(n+4)+a(n+3)+a(n+2)+a(n+1)+2*a(n) with a(0)=0, a(1)=a(2)=a(3)=a(4)=1.at n=22A226310
• Expansion of 1/((1 - 2*x)*(1 + x + x^2 + x^3 + x^4)).at n=20A349842
• a(n) = Sum_{k = 1..n} ( n/gcd(k, n) )^4.at n=15A372965
• Prime numbersat n=44659