Sequence of distinct least triangular numbers such that the arithmetic mean of the first n terms is also a triangular number. Initial term is 0.

A236415

Sequence of distinct least triangular numbers such that the arithmetic mean of the first n terms is also a triangular number. Initial term is 0.

Terms

    a(0) =0a(1) =6a(2) =3a(3) =15a(4) =741a(5) =153a(6) =25878a(7) =3828a(8) =16653a(9) =253a(10) =4753a(11) =23653a(12) =6328a(13) =53956a(14) =9730a(15) =191890a(16) =21115a(17) =140185a(18) =1225a(19) =26335a(20) =317206a(21) =3160a(22) =38503a(23) =2108431a(24) =37950a(25) =121278a(26) =1440905403a(27) =53483653a(28) =201733741a(29) =58595725

External references