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A271551 a(0) = 0, a(n) = a(n-1)[n-1]a(n-1). 1
0, 1, 2, 4, 256 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a[n]b is the square-bracket notation for n-th hyperoperation of a times b see A054871 for more info.

LINKS

Table of n, a(n) for n=0..4.

EXAMPLE

a(0) = 0;

a(1) = a(0)[0]a(0) = 1;

a(2) = a(1)[1]a(1) = 1+1 = 2;

a(3) = a(2)[2]a(2) = 2*2 = 4;

a(4) = a(3)[3]a(3) = 4^4 = 256;

a(5) = a(4)[4]a(4) = 256^^256 = 256^256^....^256 (256 times).

CROSSREFS

Cf. A271552.

Sequence in context: A018770 A260755 A173566 * A058990 A343255 A262413

Adjacent sequences:  A271548 A271549 A271550 * A271552 A271553 A271554

KEYWORD

nonn,bref

AUTHOR

Natan Arie Consigli, Apr 09 2016

STATUS

approved

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Last modified June 21 15:37 EDT 2021. Contains 345364 sequences. (Running on oeis4.)