OFFSET
1,2
LINKS
Kacper Blachut, Table of n, a(n) for n = 1..14
FORMULA
a(2n) = (2^(8*n^3) + 3*2^(2*n^3 + 3) + 13*2^(4*n^3 + 1) + 2^((4*n^3 + 2*n + 12)/3) + 2^((8*n^3 + 4*n + 9)/3) + 3*2^(4*n^3 + 2*n^2 + 1))/96.
a(2n+1) = (2^(8*n^3 + 12*n^2 + 6*n + 1) + 6*2^(2*n^3 + 3*n^2 + 4*n + 1) + 9*2^(4*n^3 + 6*n^2 + 4*n + 1) + 8*2^((8*n^3 + 12*n^2 + 10*n + 3)/3) + 9*2^(4*n^3 + 8*n^2 + 5*n + 1) + 6*2^(2*n^3 + 3*n^2 + 2*n + 1) + 2^(4*n^3 + 6*n^2 + 3*n + 1) + 8*2^((4*n^3 + 6*n^2 + 5*n + 3)/3))/96.
CROSSREFS
KEYWORD
nonn
AUTHOR
Kacper Blachut, Jan 21 2022
STATUS
approved