90706

Appears in sequences

• Number of strictly increasing arrangements of 6 nonzero numbers in -(n+4)..(n+4) with sum zero.at n=18A188125
• Triangle of coefficients of polynomials u(n,x) jointly generated with A210756; see the Formula section.at n=50A210755
• a(0) = 1, a(n) = (denominator of the Bernoulli number B_{2n})/3, for n>=1.at n=45A277087
• Smallest k for which the number of divisors d of k such that d == -d^k (mod k) is equal to n, or -1 if no such k exists.at n=9A386913