28987

Appears in sequences

• Denominators of continued fraction convergents to sqrt(803).at n=7A042549
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+833)^2 = y^2.at n=35A129010
• Quadruple lucky numbers (lower terms). Numbers n such that n, n+2, n+6, n+8 are all Lucky numbers.at n=24A139783
• 7 times heptagonal numbers: a(n) = 7*n*(5*n-3)/2.at n=41A152777
• a(n) is the number of symmetric domino towers with n bricks.at n=20A320314
• a(n) = A014284(n^2) + A014284(n^2-1).at n=8A361150
• Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 2 + 3*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2*x - x^2.at n=42A367297