OFFSET
1,3
LINKS
T. D. Noe, Rows n = 1..100 of triangle, flattened
EXAMPLE
Triangle begins:
1;
1, 4;
1, 7, 3;
2, 0, 0, 0;
2, 2, 3, 6, 1;
2, 4, 4, 9, 4, 9;
2, 6, 4, 5, 7, 5, 1;
2, 8, 2, 8, 4, 2, 7, 1;
3, 0, 0, 0, 0, 0, 0, 0, 0;
3, 1, 6, 2, 2, 7, 7, 6, 6, 0;
3, 3, 1, 6, 6, 2, 4, 7, 9, 0, 4;
3, 4, 6, 4, 1, 0, 1, 6, 1, 5, 1, 4;
3, 6, 0, 5, 5, 5, 1, 2, 7, 5, 4, 6, 4;
...
MATHEMATICA
sds[n_]:=Module[{c=RealDigits[Sqrt[n], 10, n+1][[1]]}, If[Last[c]<5, Most[c], IntegerDigits[ FromDigits[Most[c]]+1]]]; Flatten[Array[sds, 20]] (* Harvey P. Dale, Dec 13 2011 *)
CROSSREFS
KEYWORD
AUTHOR
Jonas Persson (jptmp(AT)hotmail.com), N. J. A. Sloane
STATUS
approved