A271551 a(0) = 0, a(n) = a(n-1)[n-1]a(n-1).

0, 1, 2, 4, 256

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