A371786 - cp's OEIS frontend

A371786 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(4n-k,n-2k).

n	a(n)
0	1
1	4
2	27
3	209
4	1716
5	14553
6	125971
7	1105885
8	9809019
9	87691592
10	788832045
11	7131655908
12	64743390321
13	589808771881
14	5389066722654
15	49365637128655
16	453212161425716
17	4168951499299185
18	38415242186255419
19	354527945536409116
20	3276414018301664025

[1, 4, 27, 209, 1716, 14553, 125971, 1105885, 9809019, 87691592, 788832045, 7131655908, 64743390321, 589808771881, 5389066722654, 49365637128655, 453212161425716, 4168951499299185, 38415242186255419, 354527945536409116, 3276414018301664025]

cp's OEIS Frontend

A371786 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(4n-k,n-2k).

Table of values

List of values

cp's OEIS Frontend

A371786 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(4*n-k,n-2*k).

Table of values

List of values

A371786 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(4n-k,n-2k).