A212658 - cp's OEIS frontend

A212658 Number of multisets {1^k1, 2^k2, ..., n^kn}, ki >= 0, with the sum of reciprocals <= 1.

n	a(n)
0	1
1	2
2	4
3	8
4	17
5	37
6	86
7	199
8	475
9	1138
10	2769
11	6748
12	16613
13	40904
14	101317
15	251401
16	624958
17	1555940
18	3882708
19	9701790
20	24276866
21	60817940
22	152508653
23	382828565
24	961859364
25	2418662434
26	6086480305
27	15327208770
28	38622901484
29	97384378728
30	245686368946
31	620158662562

[1, 2, 4, 8, 17, 37, 86, 199, 475, 1138, 2769, 6748, 16613, 40904, 101317, 251401, 624958, 1555940, 3882708, 9701790, 24276866, 60817940, 152508653, 382828565, 961859364, 2418662434, 6086480305, 15327208770, 38622901484, 97384378728, 245686368946, 620158662562]

cp's OEIS Frontend

A212658 Number of multisets {1^k1, 2^k2, ..., n^kn}, ki >= 0, with the sum of reciprocals <= 1.

Table of values

List of values