a(n) = T(2n-1,n-1), T given by A026758. Also T(2n+1,n+1), T given by A026747.
A026762
a(n) = T(2n-1,n-1), T given by A026758. Also T(2n+1,n+1), T given by A026747.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =66a(4) =279a(5) =1201a(6) =5242a(7) =23133a(8) =103015a(9) =462269a(10) =2088146a(11) =9487405a(12) =43328580a(13) =198798447a(14) =915950385a(15) =4236322720a(16) =19661850045a(17) =91549502656a(18) =427539667095
External references
- oeis: A026762