# This is the b127396.txt text file.
# A127396: Number of 3-almostprimes <= 2^n. 
# Dated 20 March 2022.


1  0
2  0
3  1
4  2
5  7
6  13
7  30
8  60
9  125
10  256
11  513
12  1049
13  2082
14  4214
15  8401
16  16771
17  33427
18  66550
19  132405
20  262865
21  522296
22  1036033
23  2055256
24  4075039
25  8078110
26  16008485
27  31720903
28  62847087
29  124501149
30  246638355
31  488559079
32  967785236
33  1917099175
34  3797688543
35  7523351326
36  14904714984
37  29529842241
38  58509382774
39  115936539885
40  229745312470
41  455309498894
42  902405195592
43  1788677898150
44  3545677922239
45  7029159258129
46  13936219407773
47  27632747530386
48  54794989488692
49  108666401090443
50  215519834798477
51  427480726803436
52  847974758895595
53  1682232756183268