A258171 - cp's OEIS frontend

A258171 a(n) = Sum_{d|n} phi(d)*Bell(n/d) for n>0, a(0) = 0.

n	a(n)
0	0
1	1
2	3
3	7
4	19
5	56
6	214
7	883
8	4163
9	21163
10	116039
11	678580
12	4213848
13	27644449
14	190900217
15	1382958677
16	10480146333
17	82864869820
18	682076827740
19	5832742205075
20	51724158351527
21	474869816158547
22	4506715739125923
23	44152005855084368
24	445958869299027638

[0, 1, 3, 7, 19, 56, 214, 883, 4163, 21163, 116039, 678580, 4213848, 27644449, 190900217, 1382958677, 10480146333, 82864869820, 682076827740, 5832742205075, 51724158351527, 474869816158547, 4506715739125923, 44152005855084368, 445958869299027638]

cp's OEIS Frontend

A258171 a(n) = Sum_{d|n} phi(d)*Bell(n/d) for n>0, a(0) = 0.

Table of values

List of values