a(1)=1, a(n)=a(n-a(1))+a(n-a(2))+a(n-a(3))+....a(n-a(n-1)) for n>1, with convention that a(i)=0 for i<=0.

A052109

a(1)=1, a(n)=a(n-a(1))+a(n-a(2))+a(n-a(3))+....a(n-a(n-1)) for n>1, with convention that a(i)=0 for i<=0.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =12a(5) =30a(6) =73a(7) =178a(8) =434a(9) =1058a(10) =2580a(11) =6291a(12) =15341a(13) =37408a(14) =91217a(15) =222427a(16) =542374a(17) =1322546a(18) =3224947a(19) =7863835a(20) =19175478a(21) =46758223a(22) =114017050a(23) =278023561a(24) =677943348a(25) =1653123143a(26) =4031039074a(27) =9829440768a(28) =23968486545a(29) =58445679752

External references