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edited Jul 29, 2016 at 22:19

edited Jul 29, 2016 at 22:19

Haskell, 35(削除) 35 (削除ここまで) 33 bytes

a n|n<3=1|b<-a.(-)n=sum$b.b<$>[1,2]n=b(b 1)+b(b 2)

Defines a function a.

a n|n<3=1|b<-a.(-)n=sum$b.b<$>[1,2]

Defines a function a.

a n|n<3=1|b<-a.(-)n=b(b 1)+b(b 2)

Defines a function a.

answered Jul 29, 2016 at 21:14

answered Jul 29, 2016 at 21:14

a n|n<3=1|b<-a.(-)n=sum$b.b<$>[1,2]

Defines a function a.