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A251515 as a simple table

na(n)
1234
22264
32264
421862
545470
621862
7211680
8915152
9915152
10211680
112047194
1218567350
1338529532
1418567350
152047194
1619818328
17376244106
181644478410
191644478410
20376244106
2119818328
22191708742
237639226604
2470039777210

[234,2264,2264,21862,45470,21862,211680,915152,
 915152,211680,2047194,18567350,38529532,18567350,
 2047194,19818328,376244106,1644478410,1644478410,
 376244106,19818328,191708742,7639226604,
 70039777210]