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A191556
Largest k with 2n divisors such that the binary representations of k-1 and k+1 are in base 2 each digitally balanced with 4n digits.
0
11, 203, 3971, 64771, 1011875, 16752659, 267475203, 4294709251, 68715414027, 1099495919619
OFFSET
1,1
FORMULA
a(n) = Max_{k: k in A191292, A000005(k)=2n, A070939(k-1)=A070939(k+1)=4*n}. - R. J. Mathar, Jun 24 2011
EXAMPLE
a(2) = 203 as 203 has 4 = 2*2 divisors and 202 and 204 are both balanced. - David A. Corneth, Apr 26 2022
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
EXTENSIONS
a(4)-a(6) from R. J. Mathar, Jun 24 2011
a(7)-a(10) from David A. Corneth, Apr 26 2022
STATUS
approved