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A018244 A self-generating sequence: there are a(n) (k+1)'s between successive k's, where k=3. 2
3, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 4, 3, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..80.

MAPLE

k := 3; A018244 := proc(n) global k; floor(n*(k+sqrt(k^2+4*k))/2)-floor((n-1)*(k+sqrt(k^2+4*k))/2); end;

CROSSREFS

Cf. A001468, A007538.

Sequence in context: A143490 A007485 A280356 * A113311 A255176 A288177

Adjacent sequences:  A018241 A018242 A018243 * A018245 A018246 A018247

KEYWORD

nonn

AUTHOR

Jonas Wallgren

STATUS

approved

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Last modified August 11 19:16 EDT 2020. Contains 336428 sequences. (Running on oeis4.)