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A144536 as a simple table

na(n)
01
11
27
315
497
5209
61351
72911
818817
940545
10262087
11564719
123650401
137865521
1450843527
15109552575
16708158977
171525870529
189863382151
1921252634831
20137379191137
21296011017105
221913445293767
234122901604639
2426650854921601
2557424611447841
26371198523608647

[1,1,7,15,97,209,1351,2911,18817,40545,262087,
 564719,3650401,7865521,50843527,109552575,
 708158977,1525870529,9863382151,21252634831,
 137379191137,296011017105,1913445293767,
 4122901604639,26650854921601,57424611447841,
 371198523608647]