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A187318 a(n) = floor(9*n/5). 6
0, 1, 3, 5, 7, 9, 10, 12, 14, 16, 18, 19, 21, 23, 25, 27, 28, 30, 32, 34, 36, 37, 39, 41, 43, 45, 46, 48, 50, 52, 54, 55, 57, 59, 61, 63, 64, 66, 68, 70, 72, 73, 75, 77, 79, 81, 82, 84, 86, 88, 90, 91, 93, 95, 97, 99, 100, 102, 104, 106, 108, 109, 111, 113, 115, 117, 118, 120, 122, 124, 126, 127, 129, 131, 133, 135, 136, 138, 140, 142, 144, 145, 147, 149 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Apart from first term 0, these are the numbers such that the iterated sum-of-digits (A010888) is odd. - Michel Marcus, Jun 07 2015

Equivalently, numbers congruent to {0, 1, 3, 5, 7} mod 9. - Bruno Berselli, Jun 15 2016

LINKS

Table of n, a(n) for n=0..83.

FORMULA

a(n) = n + floor(4*n/5).

a(n) = 2*n - 1 - floor((n - 1)/5). - Wesley Ivan Hurt, Jan 02 2017

MAPLE

A187318:=n->floor(9*n/5): seq(A187318(n), n=0..100); # Wesley Ivan Hurt, Jan 02 2017

MATHEMATICA

Table[Floor[9 n/5], {n, 0, 120}]

PROG

(MAGMA) [Floor(9*n/5) : n in [0..100]]; // Wesley Ivan Hurt, Jan 02 2017

CROSSREFS

Sequence in context: A208672 A186153 A215001 * A262770 A108598 A184808

Adjacent sequences:  A187315 A187316 A187317 * A187319 A187320 A187321

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Mar 08 2011

STATUS

approved

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Last modified May 25 19:13 EDT 2019. Contains 323576 sequences. (Running on oeis4.)