a(n) = [x^n] Product_{i=0..n} (1 + x^(2^i) )^(2^(n-i)).
A132316
a(n) = [x^n] Product_{i=0..n} (1 + x^(2^i) )^(2^(n-i)).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =88a(4) =2812a(5) =284832a(6) =96344064a(7) =112162777984
External references
- oeis: A132316
A132316
a(n) = [x^n] Product_{i=0..n} (1 + x^(2^i) )^(2^(n-i)).