75894

Appears in sequences

• a(n) = n^3 + n^2 + n.at n=42A027444
• Coefficients of the eigenfunction of a sequence transformation.at n=8A088674
• Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=28A166796
• a(n) = (n+6)*(n+1)*(n^2 + 7*n + 16)/4.at n=21A168538
• Smallest area A of Heron triangles with sides (a, b, c) in arithmetic progression of the form b - d(n), b, b + d(n), where d(n) = A091998(n) = 12*n +- 1.at n=38A229098
• a(n) = 3*(9*n - 1)*(3*n - 2).at n=31A277985
• Numbers k such that the concatenation of 2^k - 1 and 2^(k - 1) - 1 is prime.at n=27A301806
• Array read by ascending antidiagonals: T(n, k) = P(n, k) where P(n, x) are the scaled Mandelbrot-Larsen polynomials defined in A347928.at n=36A348686