A013702 Degree of variety K_{2,n}^5.

1, 2048, 832040, 193710244, 34673583028, 5372862566400, 763562937059280, 102703589621825280, 13319075453502743045, 1684658996331320739600, 209381188023138094045641, 25698882980999585848747760

Offset: 1

Author

Joachim.Rosenthal(AT)nd.edu (Joachim Rosenthal)

Keywords

• nonn
• easy

Links

• M. S. Ravi et al., Dynamic pole assignment and Schubert calculus, SIAM J. Control Optimization, 34 (1996), 813-832, esp. p. 825.

Crossrefs

Cf. A013698 (q=1), A013699 (q=2), A013700 (q=3), A013701 (q=4).

Programs

PARI

K(n,q=5)=(2*n+n*q+2*q)!*sum(j=0,q,((q-2*j)*(n+2)+1)/(n+j*(n+2))!/(n+1+(q-j)*(n+2))!)

Extensions

Edited by Ralf Stephan, May 13 2003