A343940 - cp's OEIS frontend

A343940 Sum of numbers of ways to choose a k-chain of divisors of n - k, for k = 0..n - 1.

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	19
7	30
8	45
9	66
10	95
11	135
12	187
13	256
14	346
15	463
16	613
17	803
18	1040
19	1336
20	1703
21	2158
22	2720
23	3409
24	4244
25	5251
26	6461
27	7911
28	9643
29	11707
30	14157
31	17058
32	20480
33	24502
34	29212
35	34707
36	41094
37	48496
38	57053
39	66926
40	78296
41	91369
42	106376
43	123581
44	143276
45	165786

[1, 2, 4, 7, 12, 19, 30, 45, 66, 95, 135, 187, 256, 346, 463, 613, 803, 1040, 1336, 1703, 2158, 2720, 3409, 4244, 5251, 6461, 7911, 9643, 11707, 14157, 17058, 20480, 24502, 29212, 34707, 41094, 48496, 57053, 66926, 78296, 91369, 106376, 123581, 143276, 165786]

cp's OEIS Frontend

A343940 Sum of numbers of ways to choose a k-chain of divisors of n - k, for k = 0..n - 1.

Table of values

List of values