OFFSET
2,1
COMMENTS
Trailing terms of rows of A277055.
Written in base n, the terms read: 10, 12, 13, 114, 523, 2056, 7214, 13457, 92115, 21107A, B21116, 156776A, D211117, ...
FORMULA
Conjecture: for even n>4, a(n) = (n-2)*n^(n/2-1) + n^(n/2-2) + (n^(n/2)-1)/(n-1) + n/2 - 1.
EXAMPLE
Any binary repunit multiplied by 2 is a binary pandigital, so a(2)=2 (10 in binary).
k-th decimal repunit for k>4 multiplied by 92115 gives a decimal pandigital number (see A277054) with no number less than 92115 having the same property, so a(10)=92115.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Andrey Zabolotskiy and Altug Alkan, Sep 26 2016
STATUS
approved