#R, 50 bytes
R, 50 bytes
a=function(n)ifelse(n<3,1,a(n-a(n-1))+a(n-a(n-2)))
Usage:
> a(1)
1
> a(20)
12
#R, 50 bytes
a=function(n)ifelse(n<3,1,a(n-a(n-1))+a(n-a(n-2)))
Usage:
> a(1)
1
> a(20)
12
R, 50 bytes
a=function(n)ifelse(n<3,1,a(n-a(n-1))+a(n-a(n-2)))
Usage:
> a(1)
1
> a(20)
12