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)=1, k=-1 and l=0.

A176855

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)=1, k=-1 and l=0.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =-2a(4) =-8a(5) =-25a(6) =-72a(7) =-197a(8) =-514a(9) =-1267a(10) =-2884a(11) =-5748a(12) =-8468a(13) =-119a(14) =68688a(15) =382434a(16) =1557232a(17) =5481369a(18) =17494220a(19) =51382510a(20) =138541696a(21) =335629309a(22) =685402744a(23) =919210879a(24) =-913800290a(25) =-13689355373a(26) =-71111254588a(27) =-287636394436

External references