84680

Appears in sequences

• Values of n^2 - 1 resulting from A050795.at n=23A050799
• Chebyshev polynomials S(n,291).at n=2A098248
• a(n) = 4*(3*n+1)*(3*n+2).at n=48A144410
• Number of (n+2) X (4+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=8A252691
• Both k and its reverse are one less than a square.at n=16A287389
• a(n) = n^4 + 4*n^2 + 3.at n=17A304726
• a(n) = A305312(n)/4 if A305312(n)is even and a(n) = (A305312(n) - 1)/4 if A305312(n) is odd, for n >= 1.at n=8A308687
• a(n) is the numerator of the square of the n-th Lagrange number.at n=8A382098