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.

A307458 Composites c where an integer b with 1 < b < c exists such that when the k digits in the base-b expansion of c are considered as exponents in an ordered list of primes prime(1), prime(2), ..., prime(k), then Product_{i=1..k} prime(i)^d[i] = c, where d[h] gives the h-th most significant digit in the expansion.

Table of values

n a(n)
1 6
2 10
3 18
4 36
5 54
6 96
7 100
8 162
9 200
10 216
11 256
12 324
13 486
14 1296
15 1458
16 2916
17 4374
18 5832
19 13122
20 26244
21 39366
22 46656
23 47250
24 49000
25 65536
26 82944
27 104976
28 118098
29 157464
30 181500
31 236196
32 354294
33 746496
34 1062882
35 1492992
36 1679616
37 1990656
38 2125764
39 3188646
40 3538944

List of values

[6, 10, 18, 36, 54, 96, 100, 162, 200, 216, 256, 324, 486, 1296, 1458, 2916, 4374, 5832, 13122, 26244, 39366, 46656, 47250, 49000, 65536, 82944, 104976, 118098, 157464, 181500, 236196, 354294, 746496, 1062882, 1492992, 1679616, 1990656, 2125764, 3188646, 3538944]

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

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