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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.

A185542 a(n) = m*(m+1)/2, where m = floor(n^(5/2)).

Table of values

n a(n)
1 1
2 15
3 120
4 528
5 1540
6 3916
7 8385
8 16471
9 29646
10 50086
11 80601
12 124251
13 185745
14 269011
15 379756
16 524800
17 709836
18 944625
19 1237951
20 1599366
21 2041210
22 2577585
23 3216916
24 3980431
25 4884375
26 5939181
27 7172578
28 8605026
29 10253656
30 12149985
31 14313925
32 16776528
33 19565640
34 22717170
35 26263128
36 30236976
37 34673628

List of values

[1, 15, 120, 528, 1540, 3916, 8385, 16471, 29646, 50086, 80601, 124251, 185745, 269011, 379756, 524800, 709836, 944625, 1237951, 1599366, 2041210, 2577585, 3216916, 3980431, 4884375, 5939181, 7172578, 8605026, 10253656, 12149985, 14313925, 16776528, 19565640, 22717170, 26263128, 30236976, 34673628]

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

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