21214

Appears in sequences

• Numbers k such that A001414(k) is a square and sets a new record for squares.at n=29A064463
• a(n) = 2*prime(n)^2 - 4.at n=26A153480
• Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.at n=5A304920
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.at n=5A304924
• Number of squarefree parts in the partitions of n into 7 parts.at n=43A309459
• a(n) is the number of ways to select 3 distinct points forming a triangle of unsigned area = n from a square of grid points with side length n, divided by 4.at n=18A320542