A271553 a(n) = H_{n-1}(n,n).

1, 2, 4, 9, 64

Offset

0,2

Comments

H is the hyperoperation function see A054871 for more information.

This sequence is a shifted version of the weak Ackermann numbers H_n(n,n).

Links

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

Crossrefs

Cf. A189896 (H_n(n,n)), A054871.

Sequence in context: A162116 A162117 A162109 * A067603 A269739 A065299

Adjacent sequences: A271550 A271551 A271552 * A271554 A271555 A271556

Keyword

nonn,bref

Author

Natan Arie Consigli, Apr 09 2016

Status

approved