The graph below shows the average number of element comparisons use by various gap sequences, divided by the theoretical lower bound, i.e. log2N!. Ciuria's sequence 1, 4, 10, 23, 57, 132, 301, 701 (labelled Ci01) has been extended according to the formula .
the grapH below shows the aVErage nUMbEr oF eLemenT coMpaRISons use bY vAriouS gap sequencEs, dIvIDEd bY the tHeorEticaL LowEr bouNd, i.e. Log2n!. ciuRia'S sequEnce 1, 4, 10, 23, 57, 132, 301, 701 (lAbellEd cI01) hAS beEn eXTEndeD AcCorDINg tO The fORmULA .