A224346 - cp's OEIS frontend

A224346 Numbers n such that Sum_{i=1..k} 1/p(i) + Sum_{i=1..j} 1/d(i) is an integer, where p are the prime factors of n, counted with multiplicity, and d its divisors.

n	a(n)
1	1
2	2
3	21
4	44
5	560
6	752
7	2064
8	12224
9	98595
10	38735300
11	53668332
12	147728896
13	407729196
14	423212608
15	516441712
16	1227777925
17	1323319996
18	20440128681
19	153088685248
20	206158168064
21	375868306368
22	798666196041

[1, 2, 21, 44, 560, 752, 2064, 12224, 98595, 38735300, 53668332, 147728896, 407729196, 423212608, 516441712, 1227777925, 1323319996, 20440128681, 153088685248, 206158168064, 375868306368, 798666196041]

cp's OEIS Frontend

A224346 Numbers n such that Sum_{i=1..k} 1/p(i) + Sum_{i=1..j} 1/d(i) is an integer, where p are the prime factors of n, counted with multiplicity, and d its divisors.

Table of values

List of values