A274832 - cp's OEIS frontend

A274832 Values of n such that 2n+1 and 7n+1 are both triangular numbers (A000217).

n	a(n)
1	0
2	27
3	297
4	24570
5	267030
6	22064157
7	239792967
8	19813588740
9	215333817660
10	17792580624687
11	193369528466037
12	15977717587380510
13	173645621228683890
14	14347972600887073617
15	155933574493829667507
16	12884463417879004727880
17	140028176249837812737720

[0, 27, 297, 24570, 267030, 22064157, 239792967, 19813588740, 215333817660, 17792580624687, 193369528466037, 15977717587380510, 173645621228683890, 14347972600887073617, 155933574493829667507, 12884463417879004727880, 140028176249837812737720]

cp's OEIS Frontend

A274832 Values of n such that 2n+1 and 7n+1 are both triangular numbers (A000217).

Table of values

List of values

cp's OEIS Frontend

A274832 Values of n such that 2*n+1 and 7*n+1 are both triangular numbers (A000217).

Table of values

List of values

A274832 Values of n such that 2n+1 and 7n+1 are both triangular numbers (A000217).