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A261571 as a simple table

na(n)
01
140
2780
37528
447878
5225044
6830270
72459376
85900602
911555200
1018634704
1124942742
1227836859
1325913910
1420053913
1512815608
166699888
172829786
18948729
19245756
2047150
216276
22518
2320

[1,40,780,7528,47878,225044,830270,2459376,
 5900602,11555200,18634704,24942742,27836859,
 25913910,20053913,12815608,6699888,2829786,948729,
 245756,47150,6276,518,20]