Python 3, (削除) 53 (削除ここまで) (削除) 50 (削除ここまで) 45 bytes

f=lambda n:n and[n] if n<2else[f(n-1),f(n-2)]

Try it online!

Thanks @Dominic van Essen save 3 bytes Save 5 bytes changing the first if condition with and

Python 3, (削除) 53 (削除ここまで) (削除) 50 (削除ここまで) (削除) 45 (削除ここまで) 44 bytes

f=lambda n:n and[n]if n<2else[f(n-1),f(n-2)]

Try it online!

Thanks @Dominic van Essen save 3 bytes.

Save 5 bytes changing the first if condition with and.

Thanks @user save 1 byte.

Python 3, (削除) 53 (削除ここまで) 50 bytes

f=lambda n:0if n<1else[n]if n<2else[f(n-1),f(n-2)]

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Thanks @Dominic van Essen save 3 bytes

Python 3, (削除) 53 (削除ここまで) (削除) 50 (削除ここまで) 45 bytes

f=lambda n:n and[n] if n<2else[f(n-1),f(n-2)]

Try it online!

Thanks @Dominic van Essen save 3 bytes Save 5 bytes changing the first if condition with and