OFFSET
1,2
COMMENTS
a(6949) > 22700000 if it exists. - Chai Wah Wu, Feb 01 2016
LINKS
Reinhard Zumkeller and Chai Wah Wu, Table of n, a(n) for n = 1..6948 n = 1..391 from Reinhard Zumkeller
MATHEMATICA
f[p_] := f[p] = StringJoin @@ ToString /@ Reverse[IntegerDigits[p, 2]];
S[n_] := S[n] = SortBy[Prime[Range[n]], f];
a[n_] := a[n] = For[m = 1, True, m++, If[A263856[m] == n, Return[m]]];
Table[Print[n, " ", a[n]]; a[n], {n, 1, 391}] (* Jean-François Alcover, Sep 22 2021 *)
PROG
(Haskell)
import Data.List (elemIndex); import Data.Maybe (fromJust)
a264647 = (+ 1) . fromJust . (`elemIndex` a263856_list)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 19 2015
STATUS
approved