a(n) = larger member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers.

A185128

a(n) = larger member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers.

Terms

    a(0) =21a(1) =171a(2) =703a(3) =990a(4) =3741a(5) =4186a(6) =6786a(7) =8778a(8) =30628a(9) =38781a(10) =77028a(11) =188191a(12) =203203a(13) =219453a(14) =318801a(15) =359128a(16) =416328a(17) =678030a(18) =763230a(19) =928203a(20) =1023165a(21) =1342341a(22) =1505980a(23) =1983036a(24) =2114596a(25) =2185095a(26) =2349028a(27) =2795430a(28) =3219453a(29) =3744216

External references