Somos's sequence {b(4,n)} defined in comment in A078495: a(0)=a(1)=...=a(10)=1; for n>=11, a(n)=(a(n-1)*a(n-10)+a(n-5)*a(n-6))/a(n-11).

A271949

Somos's sequence {b(4,n)} defined in comment in A078495: a(0)=a(1)=...=a(10)=1; for n>=11, a(n)=(a(n-1)*a(n-10)+a(n-5)*a(n-6))/a(n-11).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =2a(12) =3a(13) =4a(14) =5a(15) =6a(16) =8a(17) =14a(18) =26a(19) =46a(20) =76a(21) =200a(22) =356a(23) =596a(24) =1044a(25) =1952a(26) =5136a(27) =17888a(28) =48376a(29) =109520

External references