A360153 - cp's OEIS frontend

A360153 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-6k,n-3*k).

n	a(n)
0	1
1	2
2	6
3	21
4	72
5	258
6	945
7	3504
8	13128
9	49565
10	188260
11	718560
12	2753721
13	10588860
14	40835160
15	157871241
16	611669250
17	2374441380
18	9233006541
19	35956933050
20	140220970200
21	547490880981
22	2140055896770
23	8373651697800
24	32795094564081
25	128550662334522

[1, 2, 6, 21, 72, 258, 945, 3504, 13128, 49565, 188260, 718560, 2753721, 10588860, 40835160, 157871241, 611669250, 2374441380, 9233006541, 35956933050, 140220970200, 547490880981, 2140055896770, 8373651697800, 32795094564081, 128550662334522]

cp's OEIS Frontend

A360153 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-6k,n-3*k).

Table of values

List of values

cp's OEIS Frontend

A360153 a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-6*k,n-3*k).

Table of values

List of values

A360153 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-6k,n-3*k).