1,2

-4 <= a(n) - A084385(n) <= 3;

for n > 4: a(n) != A084385(n);

for n > 7: a(n) >= A084385(n) - 3.

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

(Haskell)

import Data.List (elemIndex); import Data.Maybe (fromJust)

a261351 = (+ 1) . fromJust . (`elemIndex` a084385_list)

Cf. A084385.

Sequence in context: A178898 A296616 A143529 * A249054 A103867 A075375

Adjacent sequences: A261348 A261349 A261350 * A261352 A261353 A261354

nonn

Reinhard Zumkeller, Aug 16 2015

approved