A025538 - cp's OEIS frontend

A025538 a(n) = (1/s(1) - 1/s(2) + ... + d/s(n+1)) * LCM{1, 2, ..., n}, where d = (-1)^n, s = A002944, i.e., s(k) = LCM of row k of Pascal's triangle.

n	a(n)
0	1
1	0
2	1
3	1
4	3
5	9
6	10
7	66
8	135
9	395
10	396
11	4344
12	4345
13	56471
14	56486
15	56478
16	112957
17	1920251
18	1920252
19	36484768
20	36484789
21	36484767
22	36484768
23	839149640
24	839149645
25	4195748199
26	4195748208
27	12587244596
28	12587244597
29	365030093283
30	365030093284

[1, 0, 1, 1, 3, 9, 10, 66, 135, 395, 396, 4344, 4345, 56471, 56486, 56478, 112957, 1920251, 1920252, 36484768, 36484789, 36484767, 36484768, 839149640, 839149645, 4195748199, 4195748208, 12587244596, 12587244597, 365030093283, 365030093284]

cp's OEIS Frontend

A025538 a(n) = (1/s(1) - 1/s(2) + ... + d/s(n+1)) * LCM{1, 2, ..., n}, where d = (-1)^n, s = A002944, i.e., s(k) = LCM of row k of Pascal's triangle.

Table of values

List of values