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A134067 as a simple table

na(n)
01
16
214
330
462
5126
6254
7510
81022
92046
104094
118190
1216382
1332766
1465534
15131070
16262142
17524286
181048574
192097150
204194302
218388606
2216777214
2333554430
2467108862
25134217726
26268435454
27536870910
281073741822
292147483646
304294967294
318589934590
3217179869182

[1,6,14,30,62,126,254,510,1022,2046,4094,8190,
 16382,32766,65534,131070,262142,524286,1048574,
 2097150,4194302,8388606,16777214,33554430,
 67108862,134217726,268435454,536870910,1073741822,
 2147483646,4294967294,8589934590,17179869182]