A174909 - cp's OEIS frontend

A174909 Triangle T(n,i) whose n-th row gives the number of numbers in any prime(n)# consecutive numbers whose smallest prime factor is prime(n-i+1).

n	a(n)
1	1
2	1
3	3
4	2
5	5
6	15
7	8
8	14
9	35
10	105
11	48
12	88
13	154
14	385
15	1155
16	480
17	624
18	1144
19	2002
20	5005
21	15015
22	5760
23	8160
24	10608
25	19448
26	34034
27	85085
28	255255
29	92160
30	109440
31	155040
32	201552
33	369512
34	646646
35	1616615
36	4849845
37	1658880
38	2119680
39	2517120
40	3565920

[1, 1, 3, 2, 5, 15, 8, 14, 35, 105, 48, 88, 154, 385, 1155, 480, 624, 1144, 2002, 5005, 15015, 5760, 8160, 10608, 19448, 34034, 85085, 255255, 92160, 109440, 155040, 201552, 369512, 646646, 1616615, 4849845, 1658880, 2119680, 2517120, 3565920]

cp's OEIS Frontend

A174909 Triangle T(n,i) whose n-th row gives the number of numbers in any prime(n)# consecutive numbers whose smallest prime factor is prime(n-i+1).

Table of values

List of values