login

A247938 as a simple table

na(n)
14
28
332
4128
52160
68192
7131072
8524288
98567136
10539922240
112147483648
12138055271872
132199187780272
148817412930560
15140828559963840
169008745449302368
17576463955735383776
182305843009213693952
19147573953351708377936
202361193635521975063040

[4,8,32,128,2160,8192,131072,524288,8567136,
 539922240,2147483648,138055271872,2199187780272,
 8817412930560,140828559963840,9008745449302368,
 576463955735383776,2305843009213693952,
 147573953351708377936,2361193635521975063040]