39280

Appears in sequences

• a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.at n=23A067092
• Largest coefficient in expansion of (1 + x + x^2 + ... + x^(n-1))^5 = ((1-x^n)/(1-x))^5, i.e., the coefficient of x^floor(5*(n-1)/2) and of x^ceiling(5*(n-1)/2); also number of compositions of floor(5*(n+1)/2) into exactly 5 positive integers each no more than n.at n=16A077044
• a(n) = (7*n^3 + 6*n^2 + 5*n) / 6.at n=32A101165
• Number of collinear point 8-tuples in an n X n .. X n 4-dimensional cubical grid.at n=8A178273