A254124 - cp's OEIS frontend

A254124 The number of tilings of a 3 X n rectangle using integer length rectangles with at least one side of length 1, i.e., tiles are 1 X 1, 1 X 2, ..., 1 X n, 2 X 1, 3 X 1.

n	a(n)
0	1
1	4
2	29
3	257
4	2408
5	22873
6	217969
7	2078716
8	19827701
9	189133073
10	1804125632
11	17209452337
12	164160078241
13	1565914710964
14	14937181915469
15	142485030313697
16	1359157571347928
17	12964936038223753
18	123671875897903249
19	1179699833714208556
20	11253097663211943461

[1, 4, 29, 257, 2408, 22873, 217969, 2078716, 19827701, 189133073, 1804125632, 17209452337, 164160078241, 1565914710964, 14937181915469, 142485030313697, 1359157571347928, 12964936038223753, 123671875897903249, 1179699833714208556, 11253097663211943461]

cp's OEIS Frontend

A254124 The number of tilings of a 3 X n rectangle using integer length rectangles with at least one side of length 1, i.e., tiles are 1 X 1, 1 X 2, ..., 1 X n, 2 X 1, 3 X 1.

Table of values

List of values