A022847 -id:A022847

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Search: a022847 -id:a022847

Displaying 1-2 of 2 results found.

page 1

A214860

First differences of round(n*sqrt(3)) (A022847).

+20
1

2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..87.

MATHEMATICA

Differences[Table[Round[n*Sqrt[3]], {n, 0, 100}]] (* T. D. Noe, Mar 11 2013 *)

CROSSREFS

Cf. A022847.

KEYWORD

nonn,easy

AUTHOR

Philippe Deléham, Mar 09 2013

EXTENSIONS

More terms from T. D. Noe, Mar 11 2013

STATUS

approved

A198081

a(n) = ceiling(n*sqrt(3)).

+10
1

0, 2, 4, 6, 7, 9, 11, 13, 14, 16, 18, 20, 21, 23, 25, 26, 28, 30, 32, 33, 35, 37, 39, 40, 42, 44, 46, 47, 49, 51, 52, 54, 56, 58, 59, 61, 63, 65, 66, 68, 70, 72, 73, 75, 77, 78, 80, 82, 84, 85, 87, 89, 91, 92, 94, 96, 97, 99, 101, 103

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

OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

MATHEMATICA

Ceiling[Range[0, 60]Sqrt[3]] (* Harvey P. Dale, May 06 2012 *)

PROG

(Magma) [Ceiling(n*Sqrt(3)): n in [0..60]]

(Python)

from math import isqrt

def A198081(n): return 1+isqrt(3*n*n) if n else 0 # Chai Wah Wu, Jul 29 2022