A229131 - cp's OEIS frontend

A229131 Numbers k such that the distance between the k-th triangular number and the nearest square is exactly 1.

n	a(n)
1	1
2	2
3	4
4	5
5	15
6	25
7	32
8	90
9	148
10	189
11	527
12	865
13	1104
14	3074
15	5044
16	6437
17	17919
18	29401
19	37520
20	104442
21	171364
22	218685
23	608735
24	998785
25	1274592
26	3547970
27	5821348
28	7428869
29	20679087
30	33929305
31	43298624

[1, 2, 4, 5, 15, 25, 32, 90, 148, 189, 527, 865, 1104, 3074, 5044, 6437, 17919, 29401, 37520, 104442, 171364, 218685, 608735, 998785, 1274592, 3547970, 5821348, 7428869, 20679087, 33929305, 43298624]

cp's OEIS Frontend

A229131 Numbers k such that the distance between the k-th triangular number and the nearest square is exactly 1.

Table of values

List of values