90708

Appears in sequences

• Number of -n..n arrays x(0..2) of 3 elements with nonzero sum and with zero through 2 differences all nonzero.at n=22A200166
• a(n) = 4^n * [x^n] Product_{k>=1} 1/(1 - 3*x^k)^(1/2).at n=5A370714