The smaller of two consecutive triangular numbers which are permutations of each other.

A247305

The smaller of two consecutive triangular numbers which are permutations of each other.

Terms

    a(0) =404550a(1) =2653056a(2) =3643650a(3) =5633046a(4) =6413571a(5) =10122750a(6) =10656036a(7) =13762881a(8) =19841850a(9) =26634051a(10) =32800950a(11) =47848653a(12) =56769840a(13) =71634465a(14) =89184690a(15) =103672800a(16) =137108520a(17) =317053971a(18) =345069585a(19) =392714325a(20) =408508236a(21) =440762895a(22) =508948560a(23) =598735710a(24) =718830486a(25) =825215625

External references