A089999 - cp's OEIS frontend

A089999 Smallest triangular number with Hamming weight n (i.e., with exactly n 1's when written in binary).

n	a(n)
0	0
1	1
2	3
3	21
4	15
5	55
6	190
7	253
8	703
9	3003
10	5886
11	13695
12	4095
13	49141
14	106491
15	192510
16	784378
17	1915903
18	3407355
19	5240703
20	15986685
21	30400503
22	48201471
23	124780503
24	247431135
25	602930175
26	1608777726
27	4290575295
28	7482375615
29	15938355070

[0, 1, 3, 21, 15, 55, 190, 253, 703, 3003, 5886, 13695, 4095, 49141, 106491, 192510, 784378, 1915903, 3407355, 5240703, 15986685, 30400503, 48201471, 124780503, 247431135, 602930175, 1608777726, 4290575295, 7482375615, 15938355070]

cp's OEIS Frontend

A089999 Smallest triangular number with Hamming weight n (i.e., with exactly n 1's when written in binary).

Table of values

List of values