28020

Appears in sequences

• Expansion of 2*x*(6 + 30*x - 13*x^2 - 70*x^3)/((1-x)*(1+2*x)*(1 - 4*x - 3*x^2 + 10*x^3)).at n=6A120658
• a(n) = 1000*n + 20.at n=27A157510
• Number of 4-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.at n=23A187299
• O.g.f.: exp( Sum_{n>=1} (sigma(2*n)-sigma(n))^2/2 * x^n/n ).at n=12A193538
• Number of length n+5 0..5 arrays with no disjoint triples in any consecutive six terms having the same sum.at n=0A247992
• T(n,k)=Number of length n+5 0..k arrays with no disjoint triples in any consecutive six terms having the same sum.at n=10A247995
• Number of length 1+5 0..n arrays with no disjoint triples in any consecutive six terms having the same sum.at n=4A247996
• a(n) = 2*n*(16*n - 13).at n=30A263228
• Number of ways to write n as an ordered sum of 10 squares of positive integers.at n=50A340947