[seqfan] A006578

Jamie Morken jmorken at shaw.ca
Thu Apr 27 03:32:05 CEST 2017

Hi,The sequence "number of ways to express (i+j+k)/3 where i,j,k are unique non-negative integers and i < j and j < k" gives the samesequence as A006578 "Triangular numbers plus quarter squares".  Can someone explain the connection here between these two definitions?Thanks.

More information about the SeqFan mailing list