Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=2, k=-1 and l=0.

A176856

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=2, k=-1 and l=0.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =5a(4) =14a(5) =47a(6) =164a(7) =590a(8) =2156a(9) =7985a(10) =29900a(11) =113054a(12) =431132a(13) =1656641a(14) =6408776a(15) =24942227a(16) =97596698a(17) =383740409a(18) =1515431648a(19) =6008307998a(20) =23907184340a(21) =95439446687a(22) =382146649616

External references