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A174803 n+ceiling[sqrt(n)]*floor[sqrt(n)]. 2
0, 2, 4, 5, 8, 11, 12, 13, 14, 18, 22, 23, 24, 25, 26, 27, 32, 37, 38, 39, 40, 41, 42, 43, 44, 50, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 72, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 98, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 128, 137 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..65.

FORMULA

A001477(n) + A038759(n). [From Robert G. Wilson v, Apr 17 2010]

MATHEMATICA

f[n_]:=n+Floor[Sqrt[n]]*Ceiling[Sqrt[n]]; Table[f[n], {n, 0, 5!}]

CROSSREFS

Cf. A038760

Sequence in context: A018332 A018257 A103075 * A105659 A191169 A191122

Adjacent sequences:  A174800 A174801 A174802 * A174804 A174805 A174806

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Mar 29 2010

STATUS

approved

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Last modified May 25 05:52 EDT 2013. Contains 225644 sequences.