A181933 - cp's OEIS frontend

A181933 a(n) = Sum_{k=0..n} binomial(n+k,k)sin(Pi(n+k)/2).

n	a(n)
0	0
1	1
2	-3
3	9
4	-30
5	106
6	-385
7	1421
8	-5304
9	19966
10	-75658
11	288222
12	-1102790
13	4234868
14	-16312773
15	63003869
16	-243896960
17	946066678
18	-3676303578
19	14308370014
20	-55768166380
21	217640082188
22	-850345208538
23	3325907590274
24	-13020993588680

[0, 1, -3, 9, -30, 106, -385, 1421, -5304, 19966, -75658, 288222, -1102790, 4234868, -16312773, 63003869, -243896960, 946066678, -3676303578, 14308370014, -55768166380, 217640082188, -850345208538, 3325907590274, -13020993588680]

cp's OEIS Frontend

A181933 a(n) = Sum_{k=0..n} binomial(n+k,k)sin(Pi(n+k)/2).

Table of values

List of values

cp's OEIS Frontend

A181933 a(n) = Sum_{k=0..n} binomial(n+k,k)*sin(Pi*(n+k)/2).

Table of values

List of values

A181933 a(n) = Sum_{k=0..n} binomial(n+k,k)sin(Pi(n+k)/2).