Cell H54 (calculation result) must be stored in one of cells H57...H71, depending on the integer value 1...15 entered in cell B3.
IF B3= 1 THEN cell H57=cell H54
IF B3= 2 THEN cell H58=cell H54
IF B3= 3 THEN cell H59=cell H54
IF B3= 4 THEN cell H60=cell H54
IF B3= 5 THEN cell H61=cell H54
IF B3= 6 THEN cell H62=cell H54
IF B3= 7 THEN cell H63=cell H54
IF B3= 8 THEN cell H64=cell H54
IF B3= 9 THEN cell H65=cell H54
IF B3=10 THEN cell H66=cell H54
IF B3=11 THEN cell H67=cell H54
IF B3=12 THEN cell H68=cell H54
IF B3=13 THEN cell H69=cell H54
IF B3=14 THEN cell H70=cell H54
IF B3=15 THEN cell H71=cell H54
whilst preserving ALL previous results stored in any of these cells (from ALL previous integers entered in B3). H54 will vary with B3.
Thus, if entering B3 (1,2,3) successively yields corresponding H54 results (5,13,8), then H57=5, H58=13, H59=8 -- all foregoing stored results accumulating progressively (5; 5,13; 5,13,8).
Likewise, if entering B3 (11,5,8,13,1,2) successively yields H54 results (10,4,15,6,5,13), then H67=10, H61=4, H64=15, H69=6, H57=5, H58=13 -- all foregoing stored results accumulating progressively (10; 10,4; 10,4,15; 10,4,15,6; 10,4,15,6,13; 10,4,15,6,13,3) with each successive integer entered randomly in B3