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A102890 A102889(n) is at least a(n). 1
3, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 33, 34, 34, 35, 36, 36, 37, 37, 38, 38, 39, 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 48, 48, 49, 49, 50, 50, 51, 51, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..71.

FORMULA

a(n) = ceiling(3*n^(2/3)).

EXAMPLE

a(8) = 12 because ceiling(3*8^(2/3)) = ceiling(12) = 12.

MATHEMATICA

Table[Ceiling[3*n^(2/3)], {n, 1, 85}]

CROSSREFS

Cf. A102889.

Sequence in context: A036593 A086674 A137203 * A008520 A217129 A336340

Adjacent sequences:  A102887 A102888 A102889 * A102891 A102892 A102893

KEYWORD

easy,nonn

AUTHOR

Joseph Biberstine (jrbibers(AT)indiana.edu), Jan 16 2005

STATUS

approved

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Last modified October 5 21:20 EDT 2022. Contains 357261 sequences. (Running on oeis4.)