a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.

A079863

a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.

Terms

    a(0) =34a(1) =70a(2) =144a(3) =296a(4) =608a(5) =1248a(6) =2560a(7) =5248a(8) =10752a(9) =22016a(10) =45056a(11) =92160a(12) =188416a(13) =385024a(14) =786432a(15) =1605632a(16) =3276800a(17) =6684672a(18) =13631488a(19) =27787264a(20) =56623104a(21) =115343360a(22) =234881024a(23) =478150656a(24) =973078528a(25) =1979711488a(26) =4026531840a(27) =8187281408a(28) =16642998272a(29) =33822867456

External references