OFFSET
0,2
LINKS
M. Navascues, T. Vertesi, The Structure of Matrix Product States, arXiv preprint arXiv:1509.04507 [quant-ph], 2015.
FORMULA
Conjectures from Colin Barker, Apr 26 2016: (Start)
a(n) = (93+3*(-1)^n+88*n+4*n^2+8*n^3+2*n^4)/96.
a(n) = (n^4+4*n^3+2*n^2+44*n+48)/48 for n even.
a(n) = (n^4+4*n^3+2*n^2+44*n+45)/48 for n odd.
a(n) = 4*a(n-1)-5*a(n-2)+5*a(n-4)-4*a(n-5)+a(n-6) for n>5.
G.f.: (1-2*x+x^2+2*x^3-x^4) / ((1-x)^5*(1+x)).
(End)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Apr 12 2016
STATUS
proposed