0,8

The bottom of each column is marked by a single 0 in this sequence. Value is 0 for all (N,R) for which N is greater than 2^R.

See note on efficient computation in A171871.

Table of n, a(n) for n=0..44.

R. Munafo, Classifications of N Elements

First term in each column is A000055(R+1).

Column 4 shares terms with A034189, column 5 with A034190.

Sequence in context: A021433 A228624 A124798 * A005135 A290003 A139460

Adjacent sequences: A171869 A171870 A171871 * A171873 A171874 A171875

nonn,tabf

Robert Munafo, Jan 21 2010

approved