67492

Appears in sequences

• Number of permutations p of [n] such that 1*p(1) + 2*p(2) + 3*p(3) + ... + n*p(n) is prime.at n=9A073114
• Number of nondecreasing arrangements of 6 numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*x(i)^2 zero.at n=29A188006