A380548 Main diagonal of A125585.
1, 3, 6, 10, 14, 18, 25, 30, 35, 40, 51, 57, 63, 69, 75, 91, 98, 105, 112, 119, 126, 148, 156, 164, 172, 180, 188, 196, 225, 234, 243, 252, 261, 270, 279, 288, 325, 335, 345, 355, 365, 375, 385, 395, 405, 451, 462, 473, 484, 495, 506, 517, 528, 539, 550, 606
Offset: 1
Links
- Alois P. Heinz, Table of n, a(n) for n = 1..10000
Crossrefs
Main diagonal of A125585.
Programs
-
Maple
a:= n-> (m-> n+(m+1)*(n-1-m/2))(floor((sqrt(8*n-7)-1)/2)): seq(a(n), n=1..56);
Formula
a(n) = A125585(n,n).