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

A185129

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

Terms

    a(0) =15a(1) =105a(2) =378a(3) =780a(4) =2145a(5) =1485a(6) =5460a(7) =7875a(8) =29403a(9) =21945a(10) =70125a(11) =105570a(12) =61425a(13) =37950a(14) =255255a(15) =306153a(16) =61425a(17) =667590a(18) =749700a(19) =522753a(20) =1016025a(21) =353220a(22) =176715a(23) =1471470a(24) =1445850a(25) =1747515a(26) =246753a(27) =794430a(28) =749700a(29) =514605

External references