2944656

Appears in sequences

• Squares of elements to right of central element in Pascal triangle (by row) that are not 1.at n=30A014720
• Squares of elements to left of the central element in Pascal triangle (by row).at n=42A014721
• Squares of numbers in array formed from even elements to the right of middle of rows of Pascal triangle.at n=18A014762
• Squares of distinct elements in Pascal triangle.at n=40A014764
• a(n) = binomial(n, floor(n/2))^2 = A001405(n)^2.at n=13A018224
• a(0) = 1; for n > 0, binomial(2n-1, n-1)^2.at n=7A060150
• a(n) = n^2 * (n+1)^2 * (n+2)^2 = 36*A001249(n-1).at n=11A099764
• Norm of coefficients in g.f. C(x) that satisfies: C(x) = 1 + x/C(I*x).at n=28A193384
• Areas of primitive Heronian triangles K which are perfect squares.at n=37A248108
• Number of (n+2) X (2+2) 0..1 arrays with no 3 x 3 subblock diagonal sum equal to the antidiagonal sum.at n=4A258675
• Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum.at n=1A258678
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum.at n=16A258681
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum.at n=19A258681
• Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 1,-1 or 2,2.at n=4A264186
• Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having index change +-(.,.) 0,0 1,-1 or 2,2.at n=3A264187
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,-1 or 2,2.at n=31A264190
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,-1 or 2,2.at n=32A264190
• a(n) = binomial(n, floor((n-1)/2))^2.at n=13A378060
• a(n) = binomial(n - 1, ceiling(n/2)) * binomial(n - 1, ceiling(n/2) - 1).at n=14A378070
• Array read by antidiagonals: T(n,k) is the number of rooted (2k)-regular planar maps with n vertices, n >= 0, k >= 0.at n=47A380241