A091270 Smallest number having in binary representation a prefix of length n that is also a suffix of its successor.
0, 2, 5, 13, 29, 61, 125, 253, 509, 1021, 2045, 4093, 8189, 16381, 32765, 65533, 131069, 262141, 524285, 1048573, 2097149, 4194301, 8388605, 16777213, 33554429, 67108861, 134217725, 268435453, 536870909, 1073741821
Offset: 0
A098800 Length of longest prefix of binary representation of n that is also a suffix of that of n^2.
1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 3, 4, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 3, 1, 0, 4, 3, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 3, 1, 0, 1, 3, 5, 0, 1, 3, 4, 0, 4, 3, 1, 0, 1, 0, 6, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 5, 0, 1, 0
Offset: 0
Links
- Index entries for sequences related to binary expansion of n
- Eric Weisstein's World of Mathematics, Binary
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