3090540

Appears in sequences

• a(n) = Hermite(n, 21).at n=4A158727
• The 4th Hermite Polynomial evaluated at n: H_4(n) = 16n^4 - 48n^2 + 12.at n=21A163323
• Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=10A241431