A047749 - cp's OEIS frontend

A047749 If n = 2m then a(n) = binomial(3m, m)/(2m+1), if n=2m+1 then a(n) = binomial(3m+1, m+1)/(2m+1).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	7
6	12
7	30
8	55
9	143
10	273
11	728
12	1428
13	3876
14	7752
15	21318
16	43263
17	120175
18	246675
19	690690
20	1430715
21	4032015
22	8414640
23	23841480
24	50067108
25	142498692
26	300830572
27	859515920
28	1822766520
29	5225264024
30	11124755664
31	31983672534
32	68328754959
33	196947587823
34	422030545335

[1, 1, 1, 2, 3, 7, 12, 30, 55, 143, 273, 728, 1428, 3876, 7752, 21318, 43263, 120175, 246675, 690690, 1430715, 4032015, 8414640, 23841480, 50067108, 142498692, 300830572, 859515920, 1822766520, 5225264024, 11124755664, 31983672534, 68328754959, 196947587823, 422030545335]

cp's OEIS Frontend

A047749 If n = 2m then a(n) = binomial(3m, m)/(2m+1), if n=2m+1 then a(n) = binomial(3m+1, m+1)/(2m+1).

Table of values

List of values

cp's OEIS Frontend

A047749 If n = 2*m then a(n) = binomial(3*m, m)/(2*m+1), if n=2*m+1 then a(n) = binomial(3*m+1, m+1)/(2*m+1).

Table of values

List of values

A047749 If n = 2m then a(n) = binomial(3m, m)/(2m+1), if n=2m+1 then a(n) = binomial(3m+1, m+1)/(2m+1).