A102477 a(n) = ceiling(Pi^(n/2)).

1, 2, 4, 6, 10, 18, 32, 55, 98, 173, 307, 543, 962, 1705, 3021, 5354, 9489, 16818, 29810, 52836, 93649, 165987, 294205, 521464, 924270, 1638225, 2903678, 5146634, 9122172, 16168628, 28658146, 50795242, 90032221, 159577957, 282844564, 501328936, 888582404

Offset: 0

Author

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Feb 24 2005

Keywords

• nonn

Crossrefs

Cf. A000796, A102475.

Programs

Mathematica

Ceiling[Pi^(Range[0,40]/2)] (* Harvey P. Dale, May 28 2015 *)

Extensions

a(0)=1 prepended by Alois P. Heinz, Feb 27 2019