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

Author

Labos Elemer

Keywords

• nonn

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.

Examples

			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.