A036379 Special connected numbers: minimal and maximal connected numbers (cf. A029827) of a given binary order, i.e., between two consecutive powers of 2.

15, 15, 45, 63, 85, 123, 153, 255, 323, 511, 603, 1023, 1139, 2047, 2227, 4095, 4369, 8189, 8777, 16383, 17219, 32767, 33667, 65535, 67591, 131069, 133897, 262143, 264967, 524285, 527621, 1048575, 1053443

Offset

1,1

Comments

Observe in the sequence that although the values of 2^g-1 are often maximal marginal connected numbers, this is not an absolute rule.

Links

Table of n, a(n) for n=1..33.

Example

Between 1024 and 2048 (i.e., in the range with binary order 11) 1139 and 2047 are the smallest and largest composite connected numbers.

Crossrefs

Cf. A029827.

Sequence in context: A003891 A298044 A022349 * A070920 A056484 A056474

Adjacent sequences: A036376 A036377 A036378 * A036380 A036381 A036382

Keyword

nonn

Author

Labos Elemer

Status

approved