OFFSET
0,2
COMMENTS
The result of the exceptional Lie group E_8 calculation is a matrix with 453060 rows and columns. Size of the matrix.. = a(1) = 453060. Number of entries... = a(2) = 205263363600.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..100
The American Institute of Mathematics, Mathematicians Maps E_8.
FORMULA
a(n) = 2^(2*n) * 3^(3*n) * 5^n * 839^n.
O.g.f.: 1/(1-453060*x). - R. J. Mathar, Nov 24 2007
a(n) = 453060^n.
EXAMPLE
a(1) = 453060 because 2^(2*1)=4, 3^(3*1)=27, 5^1=5, 839^1=839 and we can write 4*27*5*839 = 453060.
a(2) = 205263363600 because 2^(2*2)=16, 3^(3*2)=729, 5^2=25, 839^2=703921 and we can write 16*729*25*703921=205263363600.
a(1)^2 = a(2): 453060*453060 = 205263363600.
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Nov 22 2007
EXTENSIONS
Terms a(5) and beyond from Andrew Howroyd, Feb 02 2020
STATUS
approved