A207643 - cp's OEIS frontend

A207643 a(n) = 1 + (n-1) + (n-1)[n/2-1] + (n-1)[n/2-1][n/3-1] + (n-1)[n/2-1][n/3-1][n/4-1] +... for n>0 with a(0)=1, where [x] = floor(x).

n	a(n)
0	1
1	1
2	2
3	3
4	7
5	9
6	26
7	31
8	71
9	129
10	262
11	291
12	1222
13	1333
14	2198
15	5139
16	11881
17	12673
18	39594
19	41923
20	117326
21	251841
22	354292
23	371163
24	1870453
25	2598577
26	3456926
27	7103955
28	16665859
29	17283113
30	72923314
31	75437911
32	165990152
33	335534913
34	422310802
35	695765699
36	3589651696

[1, 1, 2, 3, 7, 9, 26, 31, 71, 129, 262, 291, 1222, 1333, 2198, 5139, 11881, 12673, 39594, 41923, 117326, 251841, 354292, 371163, 1870453, 2598577, 3456926, 7103955, 16665859, 17283113, 72923314, 75437911, 165990152, 335534913, 422310802, 695765699, 3589651696]

cp's OEIS Frontend

A207643 a(n) = 1 + (n-1) + (n-1)[n/2-1] + (n-1)[n/2-1][n/3-1] + (n-1)[n/2-1][n/3-1][n/4-1] +... for n>0 with a(0)=1, where [x] = floor(x).

Table of values

List of values

cp's OEIS Frontend

A207643 a(n) = 1 + (n-1) + (n-1)*[n/2-1] + (n-1)*[n/2-1]*[n/3-1] + (n-1)*[n/2-1]*[n/3-1]*[n/4-1] +... for n>0 with a(0)=1, where [x] = floor(x).

Table of values

List of values

A207643 a(n) = 1 + (n-1) + (n-1)[n/2-1] + (n-1)[n/2-1][n/3-1] + (n-1)[n/2-1][n/3-1][n/4-1] +... for n>0 with a(0)=1, where [x] = floor(x).