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A017995 as a simple table

na(n)
01
12
24
37
413
526
649
794
8179
9343
10656
111255
122401
134593
148786
1516807
1632151
1761502
18117649
19225054
20430514
21823543
221575381
233013596
245764801
2511027668
2621095169
2740353607
2877193673
29147666185
30282475249
31540355712
321033663292
331977326743
343782489985

[1,2,4,7,13,26,49,94,179,343,656,1255,2401,4593,
 8786,16807,32151,61502,117649,225054,430514,
 823543,1575381,3013596,5764801,11027668,21095169,
 40353607,77193673,147666185,282475249,540355712,
 1033663292,1977326743,3782489985]