Some embodiments provide an IC with a configurable node array that has (1) two similar nodes within the interior of the array, and (2) two different connection schemes. The first connection scheme specifies a set of connections between the first node and a set of nodes in the array, while the second connection scheme specifies a second set of connections between the second node and a set of nodes in the array. The two nodes cannot connect to any nodes on the boundary of the array with any connection that is specified in any connection scheme.