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

Author

Christian G. Bower

Keywords

• nonn

Links

• C. G. Bower, Transforms (2)

Formula

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