127988

Appears in sequences

• Number of -6..6 arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.at n=3A200452
• T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.at n=39A200454
• Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero first and second differences.at n=5A200458
• a(n) = 2^n * [x^n] Product_{k>=1} ((1 + 2*x^k)/(1 - 2*x^k))^(1/4).at n=10A370749