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A257610 as a simple table

na(n)
01
12
22
34
420
54
68
7132
8132
98
1016
11748
122112
13748
1416
1532
163964
1725124
1825124
193964
2032
2164
2220364
23256488
24552728
25256488
2620364
2764
28128
29103100
302398092
319670840
329670840
332398092
34103100
35128
36256
37518444
3821246736
39147146804
40270783520
41147146804
4221246736
43518444
44256

[1,2,2,4,20,4,8,132,132,8,16,748,2112,748,16,32,
 3964,25124,25124,3964,32,64,20364,256488,552728,
 256488,20364,64,128,103100,2398092,9670840,
 9670840,2398092,103100,128,256,518444,21246736,
 147146804,270783520,147146804,21246736,518444,256]