A099186 a(0) = 1, a(1) = 12, a(n+1) = A006564(a(n)).

1, 12, 3972, 156624027132, 9605393649115032262909140007773492, 2215570185245038872814956021479696635481690776469126111743280383568619886232750745465064720338596867052

Offset

0,2

Links

Table of n, a(n) for n=0..5.

H. K. Kim, On Regular Polytope Numbers, Proc. Amer. Math. Soc. 131 (2003), 65-75. MR 1929024

Example

a(2) = A006564(a(1)) = A006564(12) = 12*(5*12^2 - 5*12 + 2)/2 = 3972.

Crossrefs

Cf. A007501, A006564.

Sequence in context: A012609 A159395 A272093 * A307944 A105067 A096732

Adjacent sequences: A099183 A099184 A099185 * A099187 A099188 A099189

Keyword

easy,nonn

Author

Jonathan Vos Post, Nov 15 2004

Extensions

Definition and comments condensed by R. J. Mathar, Sep 09 2009

Status

approved