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.

A303356 Unitary deficient-perfect numbers: unitary deficient numbers k such that 2*k-usigma(k) is a unitary divisor of k, where usigma is the sum of unitary divisors of k (A034448).

Table of values

n a(n)
1 1
2 2
3 10
4 12
5 120
6 4080
7 5280
8 6720
9 17472
10 137280
11 174720
12 908160
13 29621760
14 31100160
15 41879040
16 89806080
17 99240960
18 101391360
19 143969280
20 226652160
21 466794240
22 732103680
23 760488960
24 779412480
25 916016640
26 918382080
27 951498240
28 1001172480
29 1365450240
30 3151948800
31 9464663040

List of values

[1, 2, 10, 12, 120, 4080, 5280, 6720, 17472, 137280, 174720, 908160, 29621760, 31100160, 41879040, 89806080, 99240960, 101391360, 143969280, 226652160, 466794240, 732103680, 760488960, 779412480, 916016640, 918382080, 951498240, 1001172480, 1365450240, 3151948800, 9464663040]

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

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