27716

Appears in sequences

• a(n) = (2*n - 11)*n^2.at n=26A015245
• Invert transform of odd numbers: a(n) = Sum_{k=1..n} (2*k+1)*a(n-k), a(0)=1.at n=7A060801
• a(n) = prime(n)^2 - prime(n+1).at n=38A062235
• Number of chiral non-crossing partition patterns of n points on a circle, divided by 2.at n=12A111276
• a(n) = (9*n+2)*(9*n+7).at n=18A177072
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+84847)^2 = y^2.at n=19A201917
• T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly one horizontal or antidiagonal neighbor.at n=42A220562
• Number of ways to reciprocally link elements of an 7Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.at n=2A220568
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.at n=43A221828
• The first of nine consecutive positive integers the sum of the squares of which is equal to the sum of the squares of eight consecutive positive integers.at n=4A262140
• Consider the group freely generated by an element U of order 3 and an element S of order 2. a(n) gives the number of words in the alphabet {U,S} of length n that are equal to unity.at n=20A265434