28425

Appears in sequences

• Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11).at n=47A017842
• Triangle T, read by rows, such that the matrix inverse satisfies: [T^-1](n,k) = -(k+1)*T(n-1,0) for n>k>=0, with T(n,n)=1 for n>=0.at n=49A112911
• a(n) = 1 + 4*n*(1 + 2*n^2)/3.at n=22A171272
• a(n) = (16/3)*(n+1)*n*(n-1) + 8*n^2 + 1.at n=16A212668
• a(n) = Sum_{i=0..n} digsum_4(i)^4, where digsum_4(i) = A053737(i).at n=49A231667
• Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.at n=15A266465