A176209 - OEIS

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A176209

Sums of at least 2 squares s', for s >= 4.

8, 13, 20, 24, 29, 33, 34, 40, 44, 45, 53, 57, 58, 62, 68, 72, 73, 77, 80, 85, 89, 90, 94, 97, 104, 108, 109, 113, 116, 120, 125, 129, 130, 134, 137, 141, 148, 152, 153, 157, 160, 164, 168, 173, 177, 178, 182, 185, 189, 193, 194, 200, 204, 205, 209, 212, 216, 220

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

8=4+4, 13=9+4, 20=16+4, 24=16+4+4, 29=25+4,...

LINKS

Table of n, a(n) for n=1..58.

MATHEMATICA

f1[n_]:=(x=n; While[x>3, x-=Floor[Sqrt[x]]^2]; x); f2[n_]:=(x=n; k=0; While[x>3, k++; x-=Floor[Sqrt[x]]^2]; k); lst={}; Do[If[f1[n]==0&&f2[n]>1, AppendTo[lst, n]], {n, 6!}]; lst

CROSSREFS

Cf. A000290

Sequence in context: A070131 A030782 A219721 * A227453 A266212 A063849

Adjacent sequences: A176206 A176207 A176208 * A176210 A176211 A176212

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Apr 12 2010

STATUS

approved