A359090 - cp's OEIS frontend

A359090 a(n) is the index of the smallest tetrahedral number with exactly n prime factors (counted with multiplicity), or -1 if no such number exists.

n	a(n)
0	1
1	-1
2	2
3	4
4	6
5	8
6	14
7	30
8	48
9	62
10	126
11	160
12	350
13	510
14	1022
15	2046
16	1024
17	4095
18	4094
19	13310
20	28672
21	32768
22	65534
23	180224
24	262142
25	360448
26	262143
27	2097151
28	3276800
29	4194302
30	2097150
31	33554432
32	16777214
33	66715648
34	33554430
35	184549374
36	134217728
37	536870910
38	1073741824

[1, -1, 2, 4, 6, 8, 14, 30, 48, 62, 126, 160, 350, 510, 1022, 2046, 1024, 4095, 4094, 13310, 28672, 32768, 65534, 180224, 262142, 360448, 262143, 2097151, 3276800, 4194302, 2097150, 33554432, 16777214, 66715648, 33554430, 184549374, 134217728, 536870910, 1073741824]

cp's OEIS Frontend

A359090 a(n) is the index of the smallest tetrahedral number with exactly n prime factors (counted with multiplicity), or -1 if no such number exists.

Table of values

List of values