OFFSET
1,12
COMMENTS
Suggested by Eric Angelini's posting to Math-Fun mailing list, Dec. 29, 2020.
EXAMPLE
a(201) = 21^0 = 1, a(21) = 2^1 = 2, a(232) = 23^2 = 529.
MAPLE
leastdigit:=proc(n)
min(convert(n, base, 10));
end:
locationdigit:=proc(n, d)
local L, i;
L:=convert(n, base, 10);
for i from 1 to nops(L) do
if d = L[i] then return (nops(L)+1-i); fi;
od:
end:
cutout:=proc(X, i) [seq(X[j], j=1..i-1), seq(X[j], j=i+1..nops(X))]; end:
ToNum:=proc(X)
add(X[i]*10^(nops(X)-i), i=1..nops(X));
end:
removeleastdigit:=proc(n)
local i, X;
i:=locationdigit(n, leastdigit(n));
X:=ListTools:-Reverse(convert(n, base, 10));
ToNum(cutout(X, i));
end proc:
a:=proc(n)
removeleastdigit(n)^leastdigit(n);
end:
PROG
(Python)
print([A340270(n) for n in range(1, 61)]) # Michael S. Branicky, Jan 03 2021
(PARI) apply( {A340270(n, m=vecmin(n=digits(n)))=#n>1&& forstep( i=#n, 1, -1, n[i]==m && return(fromdigits(n[^i])^m))}, [1..99]) \\ M. F. Hasler, Jan 03 2021
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
W. Edwin Clark, Jan 02 2021
EXTENSIONS
Changed definition as suggested by M. F. Hasler
STATUS
approved