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A011576 as a simple table

na(n)
11
267108863
31270865805301
4749329038535350
561338207158409090
61359801318005044551
711647571772911241531
847628831813556336200
9106563273280541795575
10143197070509423605675
11123519417123830092365

[1,67108863,1270865805301,749329038535350,
 61338207158409090,1359801318005044551,
 11647571772911241531,47628831813556336200,
 106563273280541795575,143197070509423605675,
 123519417123830092365]