A024689 - cp's OEIS frontend

A024689 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence).

n	a(n)
1	4
2	10
3	39
4	55
5	125
6	165
7	302
8	365
9	591
10	682
11	1006
12	1144
13	1602
14	1782
15	2374
16	2620
17	3386
18	3685
19	4650
20	5005
21	6162
22	6607
23	8003
24	8519
25	10176
26	10768
27	12676
28	13382
29	15596
30	16388
31	18888
32	19815
33	22660
34	23689
35	26907
36	28038
37	31601
38	32889
39	36865
40	38272
41	42626
42	44210

[4, 10, 39, 55, 125, 165, 302, 365, 591, 682, 1006, 1144, 1602, 1782, 2374, 2620, 3386, 3685, 4650, 5005, 6162, 6607, 8003, 8519, 10176, 10768, 12676, 13382, 15596, 16388, 18888, 19815, 22660, 23689, 26907, 28038, 31601, 32889, 36865, 38272, 42626, 44210]

cp's OEIS Frontend

A024689 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence).

Table of values

List of values