A360293 - cp's OEIS frontend

A360293 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n-1-k,k) * binomial(2n-4k,n-2*k).

n	a(n)
0	1
1	2
2	6
3	18
4	58
5	194
6	662
7	2290
8	8002
9	28178
10	99830
11	355426
12	1270586
13	4557682
14	16396454
15	59135458
16	213745922
17	774077986
18	2808105318
19	10202439858
20	37118386490
21	135210620194
22	493082387766
23	1799998114770
24	6577045868866
25	24052649767730
26	88031695861590

[1, 2, 6, 18, 58, 194, 662, 2290, 8002, 28178, 99830, 355426, 1270586, 4557682, 16396454, 59135458, 213745922, 774077986, 2808105318, 10202439858, 37118386490, 135210620194, 493082387766, 1799998114770, 6577045868866, 24052649767730, 88031695861590]

cp's OEIS Frontend

A360293 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n-1-k,k) * binomial(2n-4k,n-2*k).

Table of values

List of values

cp's OEIS Frontend

A360293 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n-1-k,k) * binomial(2*n-4*k,n-2*k).

Table of values

List of values

A360293 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n-1-k,k) * binomial(2n-4k,n-2*k).