A048356 - cp's OEIS frontend

A048356 a(n) is the index of the smallest triangular number containing exactly n 1's.

n	a(n)
1	1
2	18
3	58
4	458
5	1541
6	6018
7	47141
8	149406
9	471404
10	4756366
11	15563541
12	149075893
13	149004101
14	149071198
15	14907133333
16	47322533981
17	471406654834
18	1510636363333
19	4714049577658
20	17954448535733
21	471151591552466
22	1490649602094141
23	4519177339165085
24	15434448560354601
25	47140495990478741

[1, 18, 58, 458, 1541, 6018, 47141, 149406, 471404, 4756366, 15563541, 149075893, 149004101, 149071198, 14907133333, 47322533981, 471406654834, 1510636363333, 4714049577658, 17954448535733, 471151591552466, 1490649602094141, 4519177339165085, 15434448560354601, 47140495990478741]

cp's OEIS Frontend

A048356 a(n) is the index of the smallest triangular number containing exactly n 1's.

Table of values

List of values