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A337456 as a simple table

na(n)
11
26
330
4126
5534
62262
79534
840254
9169302
10702510
112929806
1212222414
1350908158
14212134902
15882794118
163654001326
1715159263934
1862906444238
19260853828438
201081924309806
214484440327350

[1,6,30,126,534,2262,9534,40254,169302,702510,
 2929806,12222414,50908158,212134902,882794118,
 3654001326,15159263934,62906444238,260853828438,
 1081924309806,4484440327350]