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

1, 2, 4, 9, 64

Offset: 0

Author

Natan Arie Consigli, Apr 09 2016

Keywords

• nonn
• bref

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).

Crossrefs

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