cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A343426 Triangular numbers T(i) that can be expressed as the sum of 2 positive triangular numbers, T(j)+T(k), and for which i+j+k is a triangular number, where T is A000217.

Table of values

n a(n)
1 276
2 741
3 17766
4 30876
5 42778
6 43071
7 44850
8 54946
9 73920
10 99681
11 163306
12 184528
13 254541
14 310866
15 446040
16 524800
17 963966
18 1006071
19 1046181
20 1160526
21 1258491
22 1873080
23 1929630
24 2793066
25 3034416
26 3108771
27 3121251
28 3454506
29 3635556
30 4305645
31 4317391
32 4435731
33 4831386
34 4859403

List of values

[276, 741, 17766, 30876, 42778, 43071, 44850, 54946, 73920, 99681, 163306, 184528, 254541, 310866, 446040, 524800, 963966, 1006071, 1046181, 1160526, 1258491, 1873080, 1929630, 2793066, 3034416, 3108771, 3121251, 3454506, 3635556, 4305645, 4317391, 4435731, 4831386, 4859403]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.