Triangular numbers generated in A224218. That is, the triangular numbers generated by the operation triangular(i) XOR triangular(i+1) along increasing i.

A220689

Triangular numbers generated in A224218. That is, the triangular numbers generated by the operation triangular(i) XOR triangular(i+1) along increasing i.

Terms

    a(0) =1a(1) =21a(2) =21a(3) =105a(4) =105a(5) =105a(6) =105a(7) =946a(8) =946a(9) =666a(10) =1653a(11) =666a(12) =1378a(13) =946a(14) =1225a(15) =946a(16) =4005a(17) =1378a(18) =4005a(19) =1378a(20) =7381a(21) =1225a(22) =1378a(23) =1653a(24) =2485a(25) =4005a(26) =31125a(27) =4005a(28) =4005a(29) =4005

External references