A032112 "BIJ" (reversible, indistinct, labeled) transform of 2,1,1,1...

2, 5, 31, 276, 3111, 42143, 666128, 12033346, 244550149, 5522134317, 137163540306, 3716712490472, 109104171183047, 3449120959632091, 116825788063473052, 4220828797872750510, 162026366682646437513

Offset

1,1

Links

Table of n, a(n) for n=1..17.

C. G. Bower, Transforms (2)

Formula

Numbers so far suggest that a(n) = (A006155(n)+1)/2. - Ralf Stephan, Mar 12 2004

Crossrefs

Sequence in context: A077483 A119242 A068145 * A058009 A056187 A056790

Adjacent sequences: A032109 A032110 A032111 * A032113 A032114 A032115

Keyword

nonn

Author

Christian G. Bower

Status

approved