A078995 - cp's OEIS frontend

A078995 a(n) = Sum_{k=0..n} C(4k,k)C(4*(n-k),n-k).

n	a(n)
0	1
1	8
2	72
3	664
4	6184
5	57888
6	543544
7	5113872
8	48180456
9	454396000
10	4288773152
11	40503496536
12	382701222296
13	3617396099936
14	34203591636048
15	323492394385824
16	3060238763412072
17	28955508198895584
18	274018698082833760
19	2593539713410178528
20	24550565251665845664

[1, 8, 72, 664, 6184, 57888, 543544, 5113872, 48180456, 454396000, 4288773152, 40503496536, 382701222296, 3617396099936, 34203591636048, 323492394385824, 3060238763412072, 28955508198895584, 274018698082833760, 2593539713410178528, 24550565251665845664]

cp's OEIS Frontend

A078995 a(n) = Sum_{k=0..n} C(4k,k)C(4*(n-k),n-k).

Table of values

List of values

cp's OEIS Frontend

A078995 a(n) = Sum_{k=0..n} C(4*k,k)*C(4*(n-k),n-k).

Table of values

List of values

A078995 a(n) = Sum_{k=0..n} C(4k,k)C(4*(n-k),n-k).