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.

A061455 Triangular numbers whose digit reversal is also a triangular number.

Table of values

n a(n)
1 0
2 1
3 3
4 6
5 10
6 55
7 66
8 120
9 153
10 171
11 190
12 300
13 351
14 595
15 630
16 666
17 820
18 3003
19 5995
20 8778
21 15051
22 17578
23 66066
24 87571
25 156520
26 180300
27 185745
28 547581
29 557040
30 617716
31 678030
32 828828
33 1269621
34 1461195
35 1680861
36 1851850
37 3544453
38 5073705
39 5676765
40 5911641

List of values

[0, 1, 3, 6, 10, 55, 66, 120, 153, 171, 190, 300, 351, 595, 630, 666, 820, 3003, 5995, 8778, 15051, 17578, 66066, 87571, 156520, 180300, 185745, 547581, 557040, 617716, 678030, 828828, 1269621, 1461195, 1680861, 1851850, 3544453, 5073705, 5676765, 5911641]

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

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