a(n) = coefficient of sqrt(2) in the expansion of (2 + sqrt(2) + sqrt(3))^n.
A377110
a(n) = coefficient of sqrt(2) in the expansion of (2 + sqrt(2) + sqrt(3))^n.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =23a(4) =120a(5) =629a(6) =3260a(7) =16843a(8) =86832a(9) =447241a(10) =2302516a(11) =11851487a(12) =60995880a(13) =313912637a(14) =1615504748a(15) =8313878227a(16) =42785563488a(17) =220186165393
External references
- oeis: A377110