A242536 - cp's OEIS frontend

A242536 Number of n-length words on {1,2,3,4} such that the maximal runs of identical odd integers are of odd length and the maximal runs of identical even integers are of even length.

n	a(n)
0	1
1	2
2	4
3	12
4	26
5	66
6	160
7	386
8	946
9	2292
10	5582
11	13578
12	33016
13	80330
14	195370
15	475236
16	1155974
17	2811762
18	6839416
19	16636178
20	40466002
21	98429844
22	239421374
23	582370554
24	1416562360
25	3445657082
26	8381242522
27	20386597380
28	49588514390
29	120619477410
30	293395730296

[1, 2, 4, 12, 26, 66, 160, 386, 946, 2292, 5582, 13578, 33016, 80330, 195370, 475236, 1155974, 2811762, 6839416, 16636178, 40466002, 98429844, 239421374, 582370554, 1416562360, 3445657082, 8381242522, 20386597380, 49588514390, 120619477410, 293395730296]

cp's OEIS Frontend

A242536 Number of n-length words on {1,2,3,4} such that the maximal runs of identical odd integers are of odd length and the maximal runs of identical even integers are of even length.

Table of values

List of values