A220189 If n>=3, a(n) = n^(a(n-1)/(n-1)), else a(2)=2^2.

4, 9, 64, 152587890625

Offset

2,1

Comments

Sequence used to build the absolute abnormal number 0.6562499999956991999... (A220190).

Links

Table of n, a(n) for n=2..5.

G. Martin, Absolutely Abnormal Numbers, Amer. Math. Monthly 108 (2001), no. 8, 746-754.

Prog

(PARI) a(n) = {if (n==2, return (2^2)); return (n^(a(n-1)/(n-1))); }

Crossrefs

Cf. A220190.

Sequence in context: A162991 A062926 A069020 * A122956 A041777 A367276

Adjacent sequences: A220186 A220187 A220188 * A220190 A220191 A220192

Keyword

nonn

Author

Michel Marcus, Dec 07 2012

Status

approved