A260881 - cp's OEIS frontend

A260881 Number of trapezoidal words of length n.

n	a(n)
0	1
1	2
2	4
3	8
4	16
5	28
6	46
7	70
8	102
9	140
10	190
11	250
12	318
13	398
14	496
15	602
16	724
17	862
18	1018
19	1192
20	1382
21	1584
22	1816
23	2070
24	2340
25	2630
26	2956
27	3300
28	3668
29	4064
30	4484
31	4934
32	5416
33	5918
34	6468
35	7042
36	7640
37	8274
38	8962
39	9674
40	10418
41	11202
42	12022
43	12884
44	13786
45	14712
46	15704
47	16742
48	17812
49	18924
50	20096

[1, 2, 4, 8, 16, 28, 46, 70, 102, 140, 190, 250, 318, 398, 496, 602, 724, 862, 1018, 1192, 1382, 1584, 1816, 2070, 2340, 2630, 2956, 3300, 3668, 4064, 4484, 4934, 5416, 5918, 6468, 7042, 7640, 8274, 8962, 9674, 10418, 11202, 12022, 12884, 13786, 14712, 15704, 16742, 17812, 18924, 20096]

cp's OEIS Frontend

A260881 Number of trapezoidal words of length n.

Table of values

List of values