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A178965 as a simple table

na(n)
00
11
25
315
443
5103
6263
7591
81391
93103
107007
1115039
1233983
1372063
14156543
15334591
16722687
171510911
183255807
196773759
2014433279
2130193663
2263535103
23131264511
24278589439
25575004671
261200349183
272484846591
285189910527
2910648256511
3022287450111
3145648642047

[0,1,5,15,43,103,263,591,1391,3103,7007,15039,
 33983,72063,156543,334591,722687,1510911,3255807,
 6773759,14433279,30193663,63535103,131264511,
 278589439,575004671,1200349183,2484846591,
 5189910527,10648256511,22287450111,45648642047]