A328768 - cp's OEIS frontend

A328768 The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(uv) = a(u)v + u*a(v), with a(0) = a(1) = 0.

n	a(n)
0	0
1	0
2	1
3	2
4	4
5	6
6	7
7	30
8	12
9	12
10	17
11	210
12	20
13	2310
14	67
15	28
16	32
17	30030
18	33
19	510510
20	44
21	104
22	431
23	9699690
24	52
25	60
26	4633
27	54
28	148
29	223092870
30	71
31	6469693230
32	80
33	652
34	60077
35	192
36	84
37	200560490130
38	1021039
39	6956
40	108
41	7420738134810
42	229
43	304250263527210
44	884
45	114
46	19399403
47	13082761331670030
48	128
49	420
50	145
51	90124
52	9292
53	614889782588491410
54	135
55	1116
56	324

[0, 0, 1, 2, 4, 6, 7, 30, 12, 12, 17, 210, 20, 2310, 67, 28, 32, 30030, 33, 510510, 44, 104, 431, 9699690, 52, 60, 4633, 54, 148, 223092870, 71, 6469693230, 80, 652, 60077, 192, 84, 200560490130, 1021039, 6956, 108, 7420738134810, 229, 304250263527210, 884, 114, 19399403, 13082761331670030, 128, 420, 145, 90124, 9292, 614889782588491410, 135, 1116, 324]

cp's OEIS Frontend

A328768 The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(uv) = a(u)v + u*a(v), with a(0) = a(1) = 0.

Table of values

List of values

cp's OEIS Frontend

A328768 The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(u*v) = a(u)*v + u*a(v), with a(0) = a(1) = 0.

Table of values

List of values

A328768 The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(uv) = a(u)v + u*a(v), with a(0) = a(1) = 0.