130712

Appears in sequences

• Number of nondecreasing arrangements of 8 numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero.at n=23A187992
• a(n) is the number of graceful graphs with n edges and round(sqrt(3n+9/4)) vertices.at n=17A343296