Numbers k such that the standard deviation of 1,...,k is an integer.

A007654

Numbers k such that the standard deviation of 1,...,k is an integer.

Terms

    a(0) =0a(1) =3a(2) =48a(3) =675a(4) =9408a(5) =131043a(6) =1825200a(7) =25421763a(8) =354079488a(9) =4931691075a(10) =68689595568a(11) =956722646883

External references