A067002 - cp's OEIS frontend

A067002 Numerator of Sum_{k=0..n} 2^(k-2n) binomial(2n-2k,n-k) * binomial(n+k,n).

n	a(n)
0	1
1	3
2	21
3	77
4	1155
5	4389
6	33649
7	129789
8	4023459
9	15646785
10	122044923
11	477084699
12	7474326951
13	29322359577
14	230389968105
15	906200541213
16	57090634096419
17	225004263791769
18	1775033636579511
19	7006711723340175
20	110706045228774765

[1, 3, 21, 77, 1155, 4389, 33649, 129789, 4023459, 15646785, 122044923, 477084699, 7474326951, 29322359577, 230389968105, 906200541213, 57090634096419, 225004263791769, 1775033636579511, 7006711723340175, 110706045228774765]

cp's OEIS Frontend

A067002 Numerator of Sum_{k=0..n} 2^(k-2n) binomial(2n-2k,n-k) * binomial(n+k,n).

Table of values

List of values

cp's OEIS Frontend

A067002 Numerator of Sum_{k=0..n} 2^(k-2*n) * binomial(2*n-2*k,n-k) * binomial(n+k,n).

Table of values

List of values

A067002 Numerator of Sum_{k=0..n} 2^(k-2n) binomial(2n-2k,n-k) * binomial(n+k,n).