Dimension of 5-variable non-commutative harmonics (twisted derivative). The dimension of the space of non-commutative polynomials in 5 variables which are killed by all symmetric differential operators (where for a monomial w, d_{xi} ( xi w ) = w and d_{xi} ( xj w ) = 0 for i/=j).
A122369
Dimension of 5-variable non-commutative harmonics (twisted derivative). The dimension of the space of non-commutative polynomials in 5 variables which are killed by all symmetric differential operators (where for a monomial w, d_{xi} ( xi w ) = w and d_{xi} ( xj w ) = 0 for i/=j).
Terms
- a(0) =1a(1) =4a(2) =19a(3) =93a(4) =459a(5) =2273a(6) =11274a(7) =55964a(8) =277924a(9) =1380527a(10) =6858356a(11) =34074280a(12) =169297743a(13) =841173845a(14) =4179517118a(15) =20766807551a(16) =103184684826a(17) =512698227699
External references
- oeis: A122369