a(n) = T(3n,n), where T is the array defined in A024996.
A026074
a(n) = T(3n,n), where T is the array defined in A024996.
Terms
- a(0) =1a(1) =1a(2) =12a(3) =91a(4) =726a(5) =5902a(6) =48704a(7) =406353a(8) =3419020a(9) =28958955a(10) =246598716a(11) =2109182557a(12) =18106771400a(13) =155929895685
External references
- oeis: A026074