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A274862 as a simple table

na(n)
01
11
22
34
48
516
632
764
8128
9256
10512
111040
122112
134288
148704
1517664
1636640
1776208
18158712
19330632
20688600
211481712
223210320
236987992
2415244544
2533265812
2676267252
27176853756
28413956038
29974437212
302297088912
315798212320
3214820017916
3338348190276

[1,1,2,4,8,16,32,64,128,256,512,1040,2112,4288,
 8704,17664,36640,76208,158712,330632,688600,
 1481712,3210320,6987992,15244544,33265812,
 76267252,176853756,413956038,974437212,2297088912,
 5798212320,14820017916,38348190276]