870473329

Appears in sequences

• Number of arrangements of n+1 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=7A188349
• Number of arrangements of n+1 numbers x(i) in -8..8 with the sum of x(i)*x(i+1) equal to zero.at n=7A188357
• Number of arrangements of 9 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=7A188364