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A001357 as a simple table

na(n)
01
12
24
38
417
535
671
7152
8314
9628
101357
112725
125551
1312212
1424424
1548848
16108807
17218715
18438531
19878162
201867334
213845668
227802447
2316705005
2434511011
2570122022
26150244044
27310488088
28621087187
291342185385
302684381781
315478773672
3212068657454
3324148426018

[1,2,4,8,17,35,71,152,314,628,1357,2725,5551,
 12212,24424,48848,108807,218715,438531,878162,
 1867334,3845668,7802447,16705005,34511011,
 70122022,150244044,310488088,621087187,1342185385,
 2684381781,5478773672,12068657454,24148426018]