261078

Appears in sequences

• Cardinality of the Weyl alternation set corresponding to the zero-weight in the adjoint representation of the Lie algebra so(2n+1).at n=17A232163
• Positive solution to 2^(n-1) = (1/n) * Sum_{d|n} a(d) * a(n/d).at n=15A299119
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=22A305177