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A259720 as a simple table

na(n)
1312
2556
31244
42218
53120
67076
713920
821398
942208
1089194
11149000
12268204
13564516
141024388
151778248
163578760
176862832
1812025406
1923011356
2045100872
2181318516
22150518778
23293879516
24545191574
25996711856
261914996584
273620486244

[312,556,1244,2218,3120,7076,13920,21398,42208,
 89194,149000,268204,564516,1024388,1778248,
 3578760,6862832,12025406,23011356,45100872,
 81318516,150518778,293879516,545191574,996711856,
 1914996584,3620486244]