A318738 - cp's OEIS frontend

A318738 Numbers n=2k-1 where Sum_{j=1..k} (-1)^(j+1) d(2*j-1) achieves a new negative record, with d(n) = number of divisors of n (A000005).

n	a(n)
1	3
2	15
3	39
4	63
5	99
6	259
7	319
8	403
9	675
10	679
11	943
12	1615
13	1779
14	2919
15	4899
16	5775
17	7399
18	7407
19	13475
20	13479
21	25635
22	29835
23	29839
24	44955
25	78463
26	78475
27	108927
28	108931
29	126819
30	136959
31	136975
32	136983
33	244875
34	244879
35	256355
36	276675
37	276687
38	457275
39	530139

[3, 15, 39, 63, 99, 259, 319, 403, 675, 679, 943, 1615, 1779, 2919, 4899, 5775, 7399, 7407, 13475, 13479, 25635, 29835, 29839, 44955, 78463, 78475, 108927, 108931, 126819, 136959, 136975, 136983, 244875, 244879, 256355, 276675, 276687, 457275, 530139]

cp's OEIS Frontend

A318738 Numbers n=2k-1 where Sum_{j=1..k} (-1)^(j+1) d(2*j-1) achieves a new negative record, with d(n) = number of divisors of n (A000005).

Table of values

List of values

cp's OEIS Frontend

A318738 Numbers n=2*k-1 where Sum_{j=1..k} (-1)^(j+1) * d(2*j-1) achieves a new negative record, with d(n) = number of divisors of n (A000005).

Table of values

List of values

A318738 Numbers n=2k-1 where Sum_{j=1..k} (-1)^(j+1) d(2*j-1) achieves a new negative record, with d(n) = number of divisors of n (A000005).