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A304073 as a simple table

na(n)
10
20
31
48
567
6701
710047
8218083
97758105
10478466565
1152762737260
1210566937121191
133876933205880431
142621875289142578194
153285187439267316978728
167662096100649423384254265
1733405651855362295512020765765
18273319227135047244053866187609854

[0,0,1,8,67,701,10047,218083,7758105,478466565,
 52762737260,10566937121191,3876933205880431,
 2621875289142578194,3285187439267316978728,
 7662096100649423384254265,
 33405651855362295512020765765,
 273319227135047244053866187609854]