A352430 - cp's OEIS frontend

A352430 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/5)} binomial(n,5k+1) a(n-5*k-1).

n	a(n)
0	1
1	1
2	2
3	6
4	24
5	120
6	721
7	5054
8	40488
9	364896
10	3654000
11	40249441
12	483659508
13	6296246424
14	88269037584
15	1325861901000
16	21243052172161
17	361630022931666
18	6518319228715302
19	124018898163736536
20	2483799332459535000
21	52231733840672804881
22	1150683180739820615582
23	26502219276887376327696

[1, 1, 2, 6, 24, 120, 721, 5054, 40488, 364896, 3654000, 40249441, 483659508, 6296246424, 88269037584, 1325861901000, 21243052172161, 361630022931666, 6518319228715302, 124018898163736536, 2483799332459535000, 52231733840672804881, 1150683180739820615582, 26502219276887376327696]

cp's OEIS Frontend

A352430 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/5)} binomial(n,5k+1) a(n-5*k-1).

Table of values

List of values

cp's OEIS Frontend

A352430 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/5)} binomial(n,5*k+1) * a(n-5*k-1).

Table of values

List of values

A352430 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/5)} binomial(n,5k+1) a(n-5*k-1).