1,1

Table of n, a(n) for n=1..17.

For c<257 except 238 itself, sequences E(c) never reaches 238

S(257) = 772 then E(257) =277

S(277) = 832 then E(277)= 238 then (c,1) = 238 and (c,2)=257

Cf. A006577, A129121.

Sequence in context: A069420 A205068 A229077 * A124169 A264885 A252910

Adjacent sequences: A129121 A129122 A129123 * A129125 A129126 A129127

easy,nonn,uned

Philippe LALLOUET (philip.lallouet(AT)wanadoo.fr), May 25 2007

approved