0,2

Table of n, a(n) for n=0..54.

"1" is in the sequence because if you replace each letter of "one" by its rank in the alphabet you get the string 15145 which contains at least a "1".

["3" produces the string 2081855 which contains no "3" -- thus "3" is not a "self-ranked number".]

Sequence in context: A174438 A176061 A183234 * A289628 A047387 A063282

Adjacent sequences: A108965 A108966 A108967 * A108969 A108970 A108971

base,easy,nonn,word

Eric Angelini, Jul 26 2005

More terms from Sean A. Irvine, Mar 04 2010

approved