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A036379 Special connected numbers: minimal and maximal connected numbers (cf. A029827) of a given binary order, i.e., between two consecutive powers of 2. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 14 07:07 EST 2019. Contains 329110 sequences. (Running on oeis4.)