A357558 - cp's OEIS frontend

A357558 a(n) = Sum_{k = 0..n} (-1)^(n+k)kbinomial(n,k)*binomial(n+k,k)^2.

n	a(n)
0	0
1	4
2	54
3	648
4	7500
5	85440
6	965202
7	10849552
8	121566744
9	1359160020
10	15172321890
11	169175039616
12	1884704860116
13	20982512553912
14	233474575117770
15	2596777575029280
16	28872014164369968
17	320917108809011868
18	3566175414049854306
19	39620770883613043240
20	440115513924937822020

[0, 4, 54, 648, 7500, 85440, 965202, 10849552, 121566744, 1359160020, 15172321890, 169175039616, 1884704860116, 20982512553912, 233474575117770, 2596777575029280, 28872014164369968, 320917108809011868, 3566175414049854306, 39620770883613043240, 440115513924937822020]

cp's OEIS Frontend

A357558 a(n) = Sum_{k = 0..n} (-1)^(n+k)kbinomial(n,k)*binomial(n+k,k)^2.

Table of values

List of values

cp's OEIS Frontend

A357558 a(n) = Sum_{k = 0..n} (-1)^(n+k)*k*binomial(n,k)*binomial(n+k,k)^2.

Table of values

List of values

A357558 a(n) = Sum_{k = 0..n} (-1)^(n+k)kbinomial(n,k)*binomial(n+k,k)^2.