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A251431 as a simple table

na(n)
140
2341
31888
46589
518952
644465
794452
8180625
9324136
10545021
11878516
121353921
132024188
142932293
154149792
165735557
177786700
1810376093
1913629740
2017642437
2122564780
2228519073
2335692724
2444219965
2554334868
2666206505
2780091608
2896191873

[40,341,1888,6589,18952,44465,94452,180625,324136,
 545021,878516,1353921,2024188,2932293,4149792,
 5735557,7786700,10376093,13629740,17642437,
 22564780,28519073,35692724,44219965,54334868,
 66206505,80091608,96191873]