A370819 - cp's OEIS frontend

A370819 Number of subsets of {1..n-1} whose cardinality is one less than the length of the binary expansion of n; a(0) = 0.

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	6
6	10
7	15
8	35
9	56
10	84
11	120
12	165
13	220
14	286
15	364
16	1365
17	1820
18	2380
19	3060
20	3876
21	4845
22	5985
23	7315
24	8855
25	10626
26	12650
27	14950
28	17550
29	20475
30	23751
31	27405
32	169911
33	201376
34	237336
35	278256
36	324632
37	376992
38	435897
39	501942
40	575757
41	658008
42	749398
43	850668

[0, 1, 1, 2, 3, 6, 10, 15, 35, 56, 84, 120, 165, 220, 286, 364, 1365, 1820, 2380, 3060, 3876, 4845, 5985, 7315, 8855, 10626, 12650, 14950, 17550, 20475, 23751, 27405, 169911, 201376, 237336, 278256, 324632, 376992, 435897, 501942, 575757, 658008, 749398, 850668]

cp's OEIS Frontend

A370819 Number of subsets of {1..n-1} whose cardinality is one less than the length of the binary expansion of n; a(0) = 0.

Table of values

List of values