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A230637 Leading power of 4 in A230638. 11
2, 7, 12, 5468, 10924, 5597880, 16777229 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
COMMENTS
a(9) = ( 4^5468 + 2*4^12 + 39 ) / 3.
a(10) = 4^5468 + 13.
a(11) = ( 4^10924 + 2*4^5468 + 16407 ) / 3.
a(12) = 4^10924 + 10925
a(13) = ( 4^5597880 + 3*4^10924 + 32793 ) / 3.
a(14) = ( 2*4^5597880 + 32812 ) / 3.
a(15) = ( 4^16777229 + 4^5597880 + 2*4^12 + 16427 ) / 3.
a(16) = ( 2*4^16777229 + 4^13 + 42 ) / 3.
LINKS
Max A. Alekseyev and N. J. A. Sloane, On Kaprekar's Junction Numbers, arXiv:2112.14365, 2021; Journal of Combinatorics and Number Theory, 2022 (to appear).
CROSSREFS
Cf. A230638.
Related base-4 sequences: A053737, A230631, A230632, A010064, A230633, A230634, A230635, A230636, A230637, A230638, A010065 (trajectory of 1)
Sequence in context: A353069 A046243 A230302 * A301852 A103886 A231900
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 31 2013
EXTENSIONS
Terms a(8) onward from Max Alekseyev, Oct 31 2013
STATUS
approved

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Last modified April 23 07:34 EDT 2024. Contains 371905 sequences. (Running on oeis4.)