login

A123707 as a simple table

na(n)
11
20
31
43
57
614
731
860
9126
10248
11511
121005
132047
144064
158183
1616320
1732767
1865394
19131071
20261885
21524255
221048064
232097151
244193220
258388600
2616775168
2733554304
2867104765
29134217727
30268427002
31536870911
321073725440
332147483135

[1,0,1,3,7,14,31,60,126,248,511,1005,2047,4064,
 8183,16320,32767,65394,131071,261885,524255,
 1048064,2097151,4193220,8388600,16775168,33554304,
 67104765,134217727,268427002,536870911,1073725440,
 2147483135]