A274680 - cp's OEIS frontend

A274680 Values of n such that 2n+1 and 4n+1 are both triangular numbers.

n	a(n)
1	0
2	16065
3	545751
4	21394547226
5	726784809030
6	28491418065071115
7	967869505172593485
8	37942420317086720855700
9	1288925370210688376036076
10	50528452330120333959563160501
11	1716479960463788790499334882595
12	67289447366315927998308608003134830

[0, 16065, 545751, 21394547226, 726784809030, 28491418065071115, 967869505172593485, 37942420317086720855700, 1288925370210688376036076, 50528452330120333959563160501, 1716479960463788790499334882595, 67289447366315927998308608003134830]

cp's OEIS Frontend

A274680 Values of n such that 2n+1 and 4n+1 are both triangular numbers.

Table of values

List of values

cp's OEIS Frontend

A274680 Values of n such that 2*n+1 and 4*n+1 are both triangular numbers.

Table of values

List of values

A274680 Values of n such that 2n+1 and 4n+1 are both triangular numbers.