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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.

A204270 a(n) = tau(n)*Pell(n), where tau(n) = A000005(n), the number of divisors of n.

Table of values

n a(n)
1 1
2 4
3 10
4 36
5 58
6 280
7 338
8 1632
9 2955
10 9512
11 11482
12 83160
13 66922
14 323128
15 780100
16 2354160
17 2273378
18 16465260
19 13250218
20 95966568
21 154455860
22 372889432
23 450117362
24 4346717760
25 3935214363
26 12667263848
27 30581480180
28 110745336312
29 89120964298

List of values

[1, 4, 10, 36, 58, 280, 338, 1632, 2955, 9512, 11482, 83160, 66922, 323128, 780100, 2354160, 2273378, 16465260, 13250218, 95966568, 154455860, 372889432, 450117362, 4346717760, 3935214363, 12667263848, 30581480180, 110745336312, 89120964298]

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

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