A207644 - cp's OEIS frontend

A207644 a(n) = 1 + (n-1) + (n-2)[(n-3)/2] + (n-3)[(n-4)/2][(n-5)/3] + (n-4)[(n-5)/2][(n-6)/3][(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only.

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	8
6	10
7	17
8	30
9	42
10	55
11	116
12	172
13	220
14	391
15	683
16	1024
17	1616
18	2050
19	3675
20	6520
21	9504
22	12505
23	22421
24	35572
25	56918
26	85701
27	138110
28	202765
29	326231
30	503632
31	860497
32	1376870
33	1927446
34	2818531
35	4892966
36	7784671
37	11432772
38	17287295
39	30423457
40	46453786
41	71810414

[1, 1, 2, 3, 4, 8, 10, 17, 30, 42, 55, 116, 172, 220, 391, 683, 1024, 1616, 2050, 3675, 6520, 9504, 12505, 22421, 35572, 56918, 85701, 138110, 202765, 326231, 503632, 860497, 1376870, 1927446, 2818531, 4892966, 7784671, 11432772, 17287295, 30423457, 46453786, 71810414]

cp's OEIS Frontend

A207644 a(n) = 1 + (n-1) + (n-2)[(n-3)/2] + (n-3)[(n-4)/2][(n-5)/3] + (n-4)[(n-5)/2][(n-6)/3][(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only.

Table of values

List of values

cp's OEIS Frontend

A207644 a(n) = 1 + (n-1) + (n-2)*[(n-3)/2] + (n-3)*[(n-4)/2]*[(n-5)/3] + (n-4)*[(n-5)/2]*[(n-6)/3]*[(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only.

Table of values

List of values

A207644 a(n) = 1 + (n-1) + (n-2)[(n-3)/2] + (n-3)[(n-4)/2][(n-5)/3] + (n-4)[(n-5)/2][(n-6)/3][(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only.