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A263587 as a simple table

na(n)
11
26
312
431
589
6230
7536
81171
92439
104882
119470
1217935
1333331
1460994
15110208
16197059
17349285
18614522
191074316
201867855
213232059
225569206
239560842
2416359331
2527909479
2647487870
2780606196
28136522471
29230766449
30389355662
31655827200

[1,6,12,31,89,230,536,1171,2439,4882,9470,17935,
 33331,60994,110208,197059,349285,614522,1074316,
 1867855,3232059,5569206,9560842,16359331,27909479,
 47487870,80606196,136522471,230766449,389355662,
 655827200]