a(n) = [ a(n-1)/a(1) ] + [ a(n-1)/a(2) ] + ... + [ a(n-1)/a(n-1) ] for n >= 3, with initial terms 2,1.

A022874

a(n) = [ a(n-1)/a(1) ] + [ a(n-1)/a(2) ] + ... + [ a(n-1)/a(n-1) ] for n >= 3, with initial terms 2,1.

Terms

    a(0) =2a(1) =1a(2) =1a(3) =2a(4) =6a(5) =19a(6) =60a(7) =194a(8) =628a(9) =2035a(10) =6597a(11) =21393a(12) =69382a(13) =225031a(14) =729865a(15) =2367255a(16) =7678002a(17) =24902998a(18) =80770936a(19) =261974262a(20) =849693202a(21) =2755914018a(22) =8938593456a(23) =28991634898a(24) =94032120191a(25) =304985891949a(26) =989198096368

External references