a(n) = T(n,n), T given by A026584. Also a(n) is the number of integer strings s(0), ..., s(n) counted by T, such that s(n)=0.

A026585

a(n) = T(n,n), T given by A026584. Also a(n) is the number of integer strings s(0), ..., s(n) counted by T, such that s(n)=0.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =2a(4) =8a(5) =14a(6) =40a(7) =86a(8) =222a(9) =518a(10) =1296a(11) =3130a(12) =7770a(13) =19066a(14) =47324a(15) =117094a(16) =291260a(17) =724302a(18) =1806220a(19) =4507230a(20) =11266718a(21) =28188070a(22) =70609316a(23) =177023466a(24) =444231564a(25) =1115639586a(26) =2803975860a(27) =7052132546a(28) =17748069294a(29) =44693162266

External references