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A276581 After a(0)=0, each n occurs A261224(n) times. 3
0, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Auxiliary function for computing A276582 & A276583.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..9996

MATHEMATICA

Table[Table[n, {-1 + Length@ NestWhileList[# - Block[{m = #, c = 1}, While[a = (# - Floor[Sqrt@ #]^2) &@ m; a != 0, c++; m = a]; c] &, ((n + 1)^2) - 1, # != n^2 - 1 &]}], {n, 0, 18}] // Flatten (* Michael De Vlieger, Sep 08 2016 *)

PROG

(Scheme) (define (A276581 n) (let loop ((k 0)) (if (>= (A261223 (+ 1 k)) n) k (loop (+ 1 k)))))

CROSSREFS

Cf. A261223, A261224, A276582, A276583.

Sequence in context: A055086 A001462 A082462 * A005041 A030530 A084500

Adjacent sequences:  A276578 A276579 A276580 * A276582 A276583 A276584

KEYWORD

nonn

AUTHOR

Antti Karttunen, Sep 07 2016

STATUS

approved

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)