A336302 - OEIS

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A336302 - OEIS

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A336302

a(n) = n^2 mod ceiling(sqrt(n)).

2

0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 4, 4, 1, 0, 1, 4, 4, 1, 0, 4, 3, 4, 1, 0, 1, 4, 3, 4, 1, 0, 4, 2, 2, 4, 1, 0, 1, 4, 2, 2, 4, 1, 0, 4, 1, 0, 1, 4, 1, 0, 1, 4, 1, 0, 1, 4, 1, 0, 4, 0, 7, 7, 0, 4, 1, 0, 1, 4, 0, 7, 7, 0, 4, 1, 0, 4, 9, 6, 5, 6, 9, 4, 1, 0, 1, 4, 9, 6, 5, 6, 9, 4, 1, 0, 4, 9, 5, 3, 3, 5, 9, 4

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

OFFSET

1,17

COMMENTS

A pattern emerges for certain values where ceiling(sqrt(n)) is the same.

LINKS

Michel Marcus, Table of n, a(n) for n = 1..10000

William Marcum, Desmos graph

FORMULA

a(n) = A000290(n) mod A003059(n). - Michel Marcus, Oct 05 2020

a(n^2) = 0. - Michel Marcus, Oct 07 2020

MATHEMATICA

Table[Mod[n^2, Ceiling @ Sqrt[n]], {n, 100}] (* Amiram Eldar, Oct 05 2020 *)

PROG

(PARI) a(n) = lift(Mod(n, ceil(sqrt(n)))^2); \\ Michel Marcus, Oct 05 2020

CROSSREFS

Cf. A000290, A003059.

Sequence in context: A048152 A350037 A070430 * A373428 A163353 A164612

Adjacent sequences: A336299 A336300 A336301 * A336303 A336304 A336305

KEYWORD

nonn,easy,look

AUTHOR

William Phoenix Marcum, Oct 05 2020

STATUS

approved