Fibonacci Triangle Golfed
// by Arnauld - https://codegolf.stackexchange.com/users/58563/arnauld
f=(n,a=b=1,p)=>n?''.padEnd(p)+a+`+${b}=${b+=a}
`+f(n-1,b-a,(a+"").length-~p):''
console.log(f(20))
Great golfed solution to this question at codegolf stackexchange by user Arnauld