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A028230 as a simple table

na(n)
11
215
3209
42911
540545
6564719
77865521
8109552575
91525870529
1021252634831
11296011017105
124122901604639
1357424611447841
14799821658665135
1511140078609864049
16155161278879431551
172161117825702177665
1830100488280951055759
19419245718107612602961
205839339565225625385695

[1,15,209,2911,40545,564719,7865521,109552575,
 1525870529,21252634831,296011017105,4122901604639,
 57424611447841,799821658665135,11140078609864049,
 155161278879431551,2161117825702177665,
 30100488280951055759,419245718107612602961,
 5839339565225625385695]