|
|
|
|
0, 1, 1, 2, 2, 5, 4, 11, 10, 22, 22, 50, 43, 104, 100, 209, 206, 446, 418, 914, 886, 1838, 1825, 3800, 3664, 7696, 7591, 15470, 15370, 31466, 30910, 63398, 62866, 127154, 126742, 256559, 254156, 515168, 513004, 1032104, 1029997, 2073626, 2063866, 4156118
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
LINKS
|
|
|
FORMULA
|
a(n) ~ (1+sqrt(2) + (-1)^n*(1-sqrt(2))) * 2^(n/2 - 1).
|
|
MATHEMATICA
|
nmax = 60; 2^Range[0, nmax] - CoefficientList[Series[Product[(1 - x^k)/(1 - 2*x^k), {k, 1, nmax}], {x, 0, nmax}], x]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|