OFFSET
1,2
LINKS
Douglas E. Iannucci and Donna Mills-Taylor, On Generalizing the Connell Sequence, J. Integer Sequences, Vol. 2, 1999, #99.1.7.
FORMULA
a(n) = 5*n - 4*floor((7 + sqrt(24*n - 23))/6). See general formula in A045928. - Michel Marcus, Apr 02 2013
EXAMPLE
From Michel Marcus, Apr 02 2013: (Start)
As a triangle, sequence begins:
1;
2, 7, 12, 17;
18, 23, 28, 33, 38, 43, 48;
...
(End)
MATHEMATICA
Table[5*n - 4*Floor[(7 + Sqrt[24*n - 23])/6], {n, 61}] (* Stefano Spezia, Apr 15 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from jeroen.lahousse(AT)icl.com
STATUS
approved