A069834 - cp's OEIS frontend

A069834 a(n) = n-th reduced triangular number: n(n+1)/{2^k} where 2^k is the largest power of 2 that divides product n(n+1).

n	a(n)
1	1
2	3
3	3
4	5
5	15
6	21
7	7
8	9
9	45
10	55
11	33
12	39
13	91
14	105
15	15
16	17
17	153
18	171
19	95
20	105
21	231
22	253
23	69
24	75
25	325
26	351
27	189
28	203
29	435
30	465
31	31
32	33
33	561
34	595
35	315
36	333
37	703
38	741
39	195
40	205
41	861
42	903
43	473
44	495
45	1035
46	1081
47	141
48	147
49	1225
50	1275
51	663
52	689
53	1431
54	1485
55	385
56	399

[1, 3, 3, 5, 15, 21, 7, 9, 45, 55, 33, 39, 91, 105, 15, 17, 153, 171, 95, 105, 231, 253, 69, 75, 325, 351, 189, 203, 435, 465, 31, 33, 561, 595, 315, 333, 703, 741, 195, 205, 861, 903, 473, 495, 1035, 1081, 141, 147, 1225, 1275, 663, 689, 1431, 1485, 385, 399]

cp's OEIS Frontend

A069834 a(n) = n-th reduced triangular number: n(n+1)/{2^k} where 2^k is the largest power of 2 that divides product n(n+1).

Table of values

List of values

cp's OEIS Frontend

A069834 a(n) = n-th reduced triangular number: n*(n+1)/{2^k} where 2^k is the largest power of 2 that divides product n*(n+1).

Table of values

List of values

A069834 a(n) = n-th reduced triangular number: n(n+1)/{2^k} where 2^k is the largest power of 2 that divides product n(n+1).