A279042 - cp's OEIS frontend

A279042 Numbers k such that 2k+1 and 10k+1 are both triangular numbers (A000217).

n	a(n)
1	4455
2	30537
3	461938302
4	3166172226
5	47894687058501
6	328275068740587
7	4965816943137597372
8	34036215673995404100
9	514865832250497683700195
10	3528942913182916419190605
11	53382319214430283898266055610
12	365887859090594924500524938502

[4455, 30537, 461938302, 3166172226, 47894687058501, 328275068740587, 4965816943137597372, 34036215673995404100, 514865832250497683700195, 3528942913182916419190605, 53382319214430283898266055610, 365887859090594924500524938502]

cp's OEIS Frontend

A279042 Numbers k such that 2k+1 and 10k+1 are both triangular numbers (A000217).

Table of values

List of values

cp's OEIS Frontend

A279042 Numbers k such that 2*k+1 and 10*k+1 are both triangular numbers (A000217).

Table of values

List of values

A279042 Numbers k such that 2k+1 and 10k+1 are both triangular numbers (A000217).