A122241 Iterates of A122237, starting from 4.

4, 22, 54, 169, 516, 1841, 6076, 19256, 66140, 252691, 888179, 2900616

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Prog

(Scheme:) (define (A122241 n) (if (= 1 n) 4 (A122237 (A122241 (- n 1)))))

Crossrefs

A122242.

Sequence in context: A187930 A022603 A050773 * A341375 A076525 A089761

Adjacent sequences: A122238 A122239 A122240 * A122242 A122243 A122244

Keyword

nonn

Author

Antti Karttunen, Sep 14 2006

Status

approved