a(n) = coefficient of the term that is independent of sqrt(2), sqrt(3), and sqrt(6) in the expansion of (2 + sqrt(2) + sqrt(3))^n.
A377109
a(n) = coefficient of the term that is independent of sqrt(2), sqrt(3), and sqrt(6) in the expansion of (2 + sqrt(2) + sqrt(3))^n.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =185a(5) =922a(6) =4689a(7) =23998a(8) =123217a(9) =633458a(10) =3258489a(11) =16765718a(12) =86273225a(13) =443967370a(14) =2284733313a(15) =11757749038a(16) =60508271137a(17) =311391065570
External references
- oeis: A377109