A292897 - cp's OEIS frontend

A292897 a(n) = -Sum_{k=1..3}(-1)^(n-k)*hypergeom([k, k-n-3], [], 1).

n	a(n)
0	3
1	7
2	27
3	129
4	755
5	5187
6	40923
7	364333
8	3611811
9	39448095
10	470573723
11	6086754297
12	84847445907
13	1267953887899
14	20220829211355
15	342759892460517
16	6153802869270083
17	116652857267320503
18	2328215691932062491
19	48800672765792988145
20	1071780020853500289843

[3, 7, 27, 129, 755, 5187, 40923, 364333, 3611811, 39448095, 470573723, 6086754297, 84847445907, 1267953887899, 20220829211355, 342759892460517, 6153802869270083, 116652857267320503, 2328215691932062491, 48800672765792988145, 1071780020853500289843]

cp's OEIS Frontend

A292897 a(n) = -Sum_{k=1..3}(-1)^(n-k)*hypergeom([k, k-n-3], [], 1).

Table of values

List of values