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A337521 as a simple table

na(n)
01
11
24
317
4123
51370
624783
7720077
833868402
92574718629
10316724259769
1163030702412660
1220296202901136289
1310574384742194419229
148914226633872796546336
1512159015702987236683621533
1626834956570719465233549269667
1795827642073054913336241125602390

[1,1,4,17,123,1370,24783,720077,33868402,
 2574718629,316724259769,63030702412660,
 20296202901136289,10574384742194419229,
 8914226633872796546336,12159015702987236683621533,
 26834956570719465233549269667,
 95827642073054913336241125602390]