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A018245 A self-generating sequence: there are a(n) (k+1)'s between successive k's, where k=4. 0
4, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5, 4, 5, 5, 5, 5, 5, 4, 5, 5, 5, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MAPLE

f := proc(n, k) floor(n*(k+sqrt(k^2+4*k))/2)-floor((n-1)*(k+sqrt(k^2+4*k))/2); end; (with k=4)

CROSSREFS

Cf. A001468, A007538.

Sequence in context: A094848 A308740 A117768 * A264936 A103671 A144192

Adjacent sequences:  A018242 A018243 A018244 * A018246 A018247 A018248

KEYWORD

nonn

AUTHOR

Jonas Wallgren

STATUS

approved

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Last modified August 14 10:47 EDT 2020. Contains 336480 sequences. (Running on oeis4.)