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A265407 as a simple table

na(n)
00
11
22
34
48
516
632
764
8129
9259
10519
111036
122074
134150
148296
1516600
1633208
1766424
18132832
19265696
20531424
211062880
222125696
234251521
248502785
2517005825
2634011905
2768023301
28136047622
29272093206
30544188470
311088378998
322176753882
334353515996
348707015520
3517414063992
3634828160840
3769656354600
38139312643368

[0,1,2,4,8,16,32,64,129,259,519,1036,2074,4150,
 8296,16600,33208,66424,132832,265696,531424,
 1062880,2125696,4251521,8502785,17005825,34011905,
 68023301,136047622,272093206,544188470,1088378998,
 2176753882,4353515996,8707015520,17414063992,
 34828160840,69656354600,139312643368]