A267077 - cp's OEIS frontend

A267077 Least m>0 for which mn^2 + 1 is a square and mtriangular(n) + 1 is a triangular number (A000217). Or -1 if no such m exists.

n	a(n)
0	1
1	35
2	30
3	18135
4	189
5	27
6	321300
7	23760
8	1188585957
9	1656083
10	26
11	244894427400
12	82093908624206325
13	1858717755529547
14	86478
15	21491811639746039592
16	26135932603458945934958445
17	353382195058506640426335
18	26780050
19	7859354769338288038121982384
20	274554988002

[1, 35, 30, 18135, 189, 27, 321300, 23760, 1188585957, 1656083, 26, 244894427400, 82093908624206325, 1858717755529547, 86478, 21491811639746039592, 26135932603458945934958445, 353382195058506640426335, 26780050, 7859354769338288038121982384, 274554988002]

cp's OEIS Frontend

A267077 Least m>0 for which mn^2 + 1 is a square and mtriangular(n) + 1 is a triangular number (A000217). Or -1 if no such m exists.

Table of values

List of values

cp's OEIS Frontend

A267077 Least m>0 for which m*n^2 + 1 is a square and m*triangular(n) + 1 is a triangular number (A000217). Or -1 if no such m exists.

Table of values

List of values

A267077 Least m>0 for which mn^2 + 1 is a square and mtriangular(n) + 1 is a triangular number (A000217). Or -1 if no such m exists.