758041804800
domain: N
Appears in sequences
- a(n) = order of the orthogonal group O_n(2) if n is odd or O^(+)_n(2) if n is even.at n=4A028666
- Dimension of 4-variable non-commutative harmonics (Hausdorff derivative). The dimension of the space of non-commutative polynomials in 4 variables which are killed by all symmetric differential operators (where for a monomial w, d_{xi} ( w ) = sum over all subwords of w deleting xi once).at n=20A122393
- A bisection of A028666.at n=2A144547