A262491 - cp's OEIS frontend

A262491 The index of the first of two consecutive positive triangular numbers (A000217) the sum of which is equal to the sum of eleven consecutive positive triangular numbers.

n	a(n)
1	43
2	120
3	549
4	3783
5	17214
6	47629
7	216688
8	1490884
9	6782665
10	18766098
11	85374915
12	587404905
13	2672353188
14	7393795375
15	33637500214
16	231436042078
17	1052900373799
18	2913136612044
19	13253089709793
20	91185213174219
21	414840074924010
22	1147768431350353
23	5221683708158620

[43, 120, 549, 3783, 17214, 47629, 216688, 1490884, 6782665, 18766098, 85374915, 587404905, 2672353188, 7393795375, 33637500214, 231436042078, 1052900373799, 2913136612044, 13253089709793, 91185213174219, 414840074924010, 1147768431350353, 5221683708158620]

cp's OEIS Frontend

A262491 The index of the first of two consecutive positive triangular numbers (A000217) the sum of which is equal to the sum of eleven consecutive positive triangular numbers.

Table of values

List of values