A254443 - cp's OEIS frontend

A254443 Numbers n such that T(n) + T(n+1) + ... + T(n+21) is a square, where T(m) = A000217(m) is the m-th triangular number.

n	a(n)
1	35
2	75
3	911
4	1707
5	18383
6	34263
7	366947
8	683751
9	7320755
10	13640955
11	146048351
12	272135547
13	2913646463
14	5429070183
15	58126881107
16	108309268311
17	1159623975875
18	2160756296235
19	23134352636591
20	43106816656587
21	461527428756143
22	859975576835703
23	9207414222486467

[35, 75, 911, 1707, 18383, 34263, 366947, 683751, 7320755, 13640955, 146048351, 272135547, 2913646463, 5429070183, 58126881107, 108309268311, 1159623975875, 2160756296235, 23134352636591, 43106816656587, 461527428756143, 859975576835703, 9207414222486467]

cp's OEIS Frontend

A254443 Numbers n such that T(n) + T(n+1) + ... + T(n+21) is a square, where T(m) = A000217(m) is the m-th triangular number.

Table of values

List of values