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A204991 as a simple table

na(n)
12
22
36
44
530
66
714
88
9126
1030
112046
1212
138190
1414
1530
1616
17510
18126
19524286
2060
21126
222046
234094
2424
252097150
268190
27524286
2828
29536870910
3030
3162
3232
332046
34510
358190
36252
37137438953470
38524286
398190
40120
412097150
42126
4332766
444092
458190

[2,2,6,4,30,6,14,8,126,30,2046,12,8190,14,30,16,
 510,126,524286,60,126,2046,4094,24,2097150,8190,
 524286,28,536870910,30,62,32,2046,510,8190,252,
 137438953470,524286,8190,120,2097150,126,32766,
 4092,8190]