A202411 - cp's OEIS frontend

A202411 a(n) = Sum_{k=floor(n/4)..R} C(k, mk - (-1)^n(R - k)) * C(k + 1, m(k + 2) - (-1)^n(R - k + 1)) where m = (n + 1) mod 2 and R = (n + m - 3)/2 for n > 0 and a(0) = 1.

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	2
6	3
7	4
8	7
9	10
10	16
11	24
12	39
13	58
14	95
15	143
16	233
17	354
18	577
19	881
20	1436
21	2204
22	3590
23	5534
24	9011
25	13940
26	22691
27	35213
28	57299
29	89162
30	145043
31	226238
32	367931
33	575114
34	935078
35	1464382
36	2380405
37	3734150
38	6068745
39	9534594
40	15492702
41	24374230
42	39598631

[1, 0, 1, 1, 1, 2, 3, 4, 7, 10, 16, 24, 39, 58, 95, 143, 233, 354, 577, 881, 1436, 2204, 3590, 5534, 9011, 13940, 22691, 35213, 57299, 89162, 145043, 226238, 367931, 575114, 935078, 1464382, 2380405, 3734150, 6068745, 9534594, 15492702, 24374230, 39598631]

cp's OEIS Frontend

A202411 a(n) = Sum_{k=floor(n/4)..R} C(k, mk - (-1)^n(R - k)) * C(k + 1, m(k + 2) - (-1)^n(R - k + 1)) where m = (n + 1) mod 2 and R = (n + m - 3)/2 for n > 0 and a(0) = 1.

Table of values

List of values

cp's OEIS Frontend

A202411 a(n) = Sum_{k=floor(n/4)..R} C(k, m*k - (-1)^n*(R - k)) * C(k + 1, m*(k + 2) - (-1)^n*(R - k + 1)) where m = (n + 1) mod 2 and R = (n + m - 3)/2 for n > 0 and a(0) = 1.

Table of values

List of values

A202411 a(n) = Sum_{k=floor(n/4)..R} C(k, mk - (-1)^n(R - k)) * C(k + 1, m(k + 2) - (-1)^n(R - k + 1)) where m = (n + 1) mod 2 and R = (n + m - 3)/2 for n > 0 and a(0) = 1.