A188288 - cp's OEIS frontend

A188288 In lunar arithmetic in base 2, the number of divisors of the number 11...1101 (n digits, the binary expansion of 2^n-3).

n	a(n)
0	0
1	1
2	0
3	2
4	2
5	2
6	4
7	6
8	10
9	16
10	31
11	55
12	100
13	185
14	345
15	644
16	1209
17	2274
18	4298
19	8145
20	15469
21	29454
22	56213
23	107489
24	205925
25	395190
26	759621
27	1462282
28	2818799
29	5440705
30	10513994
31	20340794
32	39393580
33	76368240
34	148185145
35	287791544
36	559386196
37	1088144064
38	2118283567
39	4126561528
40	8044217224

[0, 1, 0, 2, 2, 2, 4, 6, 10, 16, 31, 55, 100, 185, 345, 644, 1209, 2274, 4298, 8145, 15469, 29454, 56213, 107489, 205925, 395190, 759621, 1462282, 2818799, 5440705, 10513994, 20340794, 39393580, 76368240, 148185145, 287791544, 559386196, 1088144064, 2118283567, 4126561528, 8044217224]

cp's OEIS Frontend

A188288 In lunar arithmetic in base 2, the number of divisors of the number 11...1101 (n digits, the binary expansion of 2^n-3).

Table of values

List of values