A387465 - cp's OEIS frontend

A387465 Irregular triangle T(n,k), n >= 0, 0 <= k < 2^(n-1), where T(n,k) = Product_{j=0..n-1} prime(n-j)^((j+1)*d_j), where d_j is the bit with digit weight 2^j in the binary expansion of 2^(n-1)+k.

n	a(n)
0	1
1	2
2	4
3	12
4	8
5	40
6	72
7	360
8	16
9	112
10	400
11	2800
12	432
13	3024
14	10800
15	75600
16	32
17	352
18	1568
19	17248
20	4000
21	44000
22	196000
23	2156000
24	2592
25	28512
26	127008
27	1397088
28	324000
29	3564000
30	15876000
31	174636000
32	64
33	832
34	7744
35	100672
36	21952
37	285376
38	2656192
39	34530496
40	40000
41	520000

[1, 2, 4, 12, 8, 40, 72, 360, 16, 112, 400, 2800, 432, 3024, 10800, 75600, 32, 352, 1568, 17248, 4000, 44000, 196000, 2156000, 2592, 28512, 127008, 1397088, 324000, 3564000, 15876000, 174636000, 64, 832, 7744, 100672, 21952, 285376, 2656192, 34530496, 40000, 520000]

cp's OEIS Frontend

A387465 Irregular triangle T(n,k), n >= 0, 0 <= k < 2^(n-1), where T(n,k) = Product_{j=0..n-1} prime(n-j)^((j+1)*d_j), where d_j is the bit with digit weight 2^j in the binary expansion of 2^(n-1)+k.

Table of values

List of values