how do I create a large vector in clojure

How do i allocate a vector with 1042 empty indexes?
Will the storage for it be lazily allocated?
like this

(def a (array-creation-function 1042))
(def b (assoc a 1041 42))
(b 1041) 
--> 42

What is a vector in Clojure?

A Vector is a collection of values indexed by contiguous integers. A vector is created by using the vector method in Clojure.

What is a collection in Clojure?

Clojure collections "collect" values into compound values. There are four key Clojure collection types: vectors, lists, sets, and maps. Of those four collection types, vectors and lists are ordered.

It seems that vectors are not sparse so you must specify a value for each index when you create the vector. The easiest way seems to be to call (vec ) on a sequence.