OFFSET
1,1
COMMENTS
Position of n in permutation of natural numbers A105361.
MATHEMATICA
p = RealDigits[Pi, 10, 100][[1]]; e = RealDigits[E, 10, 100][[1]]; r = Range[100]; a[n_] := a[n] = Block[{c = Complement[r, Table[ a[i], {i, n - 1}]]}, If[p[[n]] > e[[n]], Select[c, EvenQ[ # ] &][[1]], Select[c, OddQ[ # ] &][[1]]]]; t = Table[ a[n], {n, 80}]; Position[t, # ] & /@ Range[80] // Flatten
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov and Robert G. Wilson v, May 10 2005
STATUS
approved