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A268519
Odd powers of 2 written between a pair of 1's.
1
121, 181, 1321, 11281, 15121, 120481, 181921, 1327681, 11310721, 15242881, 120971521, 183886081, 1335544321, 11342177281, 15368709121, 121474836481, 185899345921, 1343597383681, 11374389534721, 15497558138881, 121990232555521, 187960930222081, 1351843720888321, 11407374883553281
OFFSET
1,1
LINKS
Marius Coman, Sequences of Integers, Conjectures and New Arithmetical Tools, Education Publishing, Columbus, Ohio, 2015. See page 24.
CROSSREFS
For primes see A268520.
Sequence in context: A346316 A284643 A074730 * A364778 A037050 A275028
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Feb 10 2016
STATUS
approved