A386705 - cp's OEIS frontend

A386705 a(n) = sum of the 2^(n-1) even positive integers having bit length 2*n and in which, when written in binary, each run of 0's is of exactly the same length as the run of 1's immediately before it.

n	a(n)
1	2
2	22
3	192
4	1576
5	12704
6	101856
7	815360
8	6524032
9	52194816
10	417564160
11	3340525568
12	26724231168
13	213793906688
14	1710351376384
15	13682811273216
16	109462490742784
17	875699927121920
18	7005599419465728
19	56044795360968704
20	448358362898759680
21	3586866903213146112
22	28694935225753403392

[2, 22, 192, 1576, 12704, 101856, 815360, 6524032, 52194816, 417564160, 3340525568, 26724231168, 213793906688, 1710351376384, 13682811273216, 109462490742784, 875699927121920, 7005599419465728, 56044795360968704, 448358362898759680, 3586866903213146112, 28694935225753403392]

cp's OEIS Frontend

A386705 a(n) = sum of the 2^(n-1) even positive integers having bit length 2*n and in which, when written in binary, each run of 0's is of exactly the same length as the run of 1's immediately before it.

Table of values

List of values