A357533 - cp's OEIS frontend

A357533 a(n) = Sum_{k=0..floor(n/4)} (n-3k)!/(n-4k)!.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	4
7	5
8	8
9	13
10	20
11	29
12	46
13	77
14	128
15	205
16	338
17	581
18	1012
19	1733
20	2990
21	5293
22	9536
23	17117
24	30778
25	56165
26	104108
27	193621
28	360662
29	677693
30	1289080
31	2467373
32	4735826
33	9142837
34	17814308
35	34950245
36	68835118
37	136197581
38	271384112
39	544302973
40	1096578410
41	2218459013
42	4513377436

[1, 1, 1, 1, 2, 3, 4, 5, 8, 13, 20, 29, 46, 77, 128, 205, 338, 581, 1012, 1733, 2990, 5293, 9536, 17117, 30778, 56165, 104108, 193621, 360662, 677693, 1289080, 2467373, 4735826, 9142837, 17814308, 34950245, 68835118, 136197581, 271384112, 544302973, 1096578410, 2218459013, 4513377436]

cp's OEIS Frontend

A357533 a(n) = Sum_{k=0..floor(n/4)} (n-3k)!/(n-4k)!.

Table of values

List of values

cp's OEIS Frontend

A357533 a(n) = Sum_{k=0..floor(n/4)} (n-3*k)!/(n-4*k)!.

Table of values

List of values

A357533 a(n) = Sum_{k=0..floor(n/4)} (n-3k)!/(n-4k)!.