A276581 - OEIS

A276581

After a(0)=0, each n occurs A261224(n) times.

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

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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: A001462 A357021 A082462 * A005041 A030530 A084500

Adjacent sequences: A276578 A276579 A276580 * A276582 A276583 A276584

KEYWORD

nonn

AUTHOR

Antti Karttunen, Sep 07 2016

STATUS

approved