A360149 - cp's OEIS frontend

A360149 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k,n-2k).

n	a(n)
0	1
1	2
2	7
3	27
4	107
5	429
6	1731
7	7012
8	28478
9	115864
10	471991
11	1924483
12	7852083
13	32053208
14	130893949
15	534673600
16	2184482707
17	8926392419
18	36479840422
19	149095843951
20	609400587426
21	2490900041118
22	10181669553847
23	41618414303969
24	170118507902985
25	695366323719302

[1, 2, 7, 27, 107, 429, 1731, 7012, 28478, 115864, 471991, 1924483, 7852083, 32053208, 130893949, 534673600, 2184482707, 8926392419, 36479840422, 149095843951, 609400587426, 2490900041118, 10181669553847, 41618414303969, 170118507902985, 695366323719302]

cp's OEIS Frontend

A360149 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k,n-2k).

Table of values

List of values

cp's OEIS Frontend

A360149 a(n) = Sum_{k=0..floor(n/2)} binomial(2*n+k,n-2*k).

Table of values

List of values

A360149 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k,n-2k).