login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A067120 a(n) =floor[X/Y] where X= concatenation of first n ODD numbers in increasing order and Y = n-th triangular number. 1
1, 4, 22, 135, 905, 64662, 4849682, 377197536, 30175802922, 2468929330031, 205744110835938, 17409117070733232, 1492210034634277058, 129324869668304011738, 11315926095976601027106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

a(4) floor[1357/(1+2+3+4)] = floor[135.7] =135.

MAPLE

for i from 1 to 33 do n := 2*i-1:c := n:n := n-2:while(n>0) do g := floor(log(c)/log(10)):c := c+10^(g+1)*n:n := n-2:end do:a[i] := floor(2*c/i/(i+1)):end do:q2 := seq(a[j], j=1..33);

CROSSREFS

Cf. A067112-A067119.

Sequence in context: A197657 A183280 A183281 * A143648 A069835 A007196

Adjacent sequences:  A067117 A067118 A067119 * A067121 A067122 A067123

KEYWORD

easy,nonn,base,less

AUTHOR

Amarnath Murthy, Jan 08 2002

EXTENSIONS

More terms from Sascha Kurz, Mar 23 2002

Edited by Charles R Greathouse IV, Apr 27 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 16 03:44 EDT 2019. Contains 324145 sequences. (Running on oeis4.)