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A037023 Triangle in which row n has the first n digits of sqrt(n) (rounded). 2
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, 3, 7, 4, 1, 6, 5, 7, 3 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

T. D. Noe, Rows n = 1..100 of triangle, flattened

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

Cf. A037022.

Sequence in context: A158860 A335619 A037022 * A143971 A016688 A143972

Adjacent sequences:  A037020 A037021 A037022 * A037024 A037025 A037026

KEYWORD

nonn,base,nice,easy,tabl

AUTHOR

Jonas Persson (jptmp(AT)hotmail.com), N. J. A. Sloane

STATUS

approved

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Last modified April 11 21:52 EDT 2021. Contains 342888 sequences. (Running on oeis4.)