427351

Properties

Appears in sequences

• Expansion of (1-x)/((1-2x)(1+x-x^2)).at n=20A052964
• Expansion of (1-4*x+2*x^2)/(1-7*x+13*x^2-4*x^3).at n=10A078789
• Primes p such that p*(p-2) divides 3^(p-1)-1.at n=23A081764
• Inverse binomial transform of Fibonacci oblongs.at n=21A084178
• a(n) = Sum_{k>=0} binomial(n,5*k+1).at n=21A133476
• a(n) = Sum_{k >= 0} binomial(n,5*k).at n=21A139398
• Primes of the form n^2 + (n+1)^3.at n=19A155933
• Primes of the form ((p+1)/2)^3 + ((p-1)/2)^2 where p is prime.at n=13A163428
• a(n) = Sum_{k == floor(n/2) (mod 5)} C(n,k).at n=21A173125
• a(n) = Sum_{k=0..n} binomial(5*n+1,5*k).at n=4A345455
• a(n) = Sum_{k=0..n} binomial(3*n,5*k).at n=7A387847
• a(n) = Sum_{k=0..n} binomial(2*n+1,5*k).at n=10A387871
• a(n) = Sum_{k=0..n} binomial(4*n+1,5*k).at n=5A387873
• Prime numbersat n=35951