Reverse or triple: if reverse(a(n)) > a(n), a(n+1) = reverse(a(n)), else a(n+1) = 3*a(n).

A042938

Reverse or triple: if reverse(a(n)) > a(n), a(n+1) = reverse(a(n)), else a(n+1) = 3*a(n).

Terms

    a(0) =1a(1) =3a(2) =9a(3) =27a(4) =72a(5) =216a(6) =612a(7) =1836a(8) =6381a(9) =19143a(10) =34191a(11) =102573a(12) =375201a(13) =1125603a(14) =3065211a(15) =9195633a(16) =27586899a(17) =99868572a(18) =299605716a(19) =617506992a(20) =1852520976a(21) =6790252581a(22) =20370757743a(23) =34775707302a(24) =104327121906a(25) =609121723401

External references