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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A078270 a(n) = A078269(n)/11. 4
1, 111, 12021, 1293931, 138575841, 14775857751, 1569413139661, 166124050421571, 17530678687703481, 101854077969780448291, 1019376417897988137639201, 10202855923708990650955830111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

MAPLE

digrev := proc(d) local r, i ; r := [] ; for i from 1 to nops(d) do r := [op(i, d), op(r)] ; od ; RETURN(r) ; end: A078269 := proc(n) local digs, res, i ; digs := [] ; for i from 1 to n do digs := [op(digs), op(digrev(convert(i, base, 10)))] ; od ; res := 0 ; for i from 1 to nops(digs) do res := 100*res+op(i, digs) ; od ; digs := [] ; for i from 1 to n do digs := [op(digs), op(convert(i, base, 10))] ; od ; res := 10*res ; for i from 1 to nops(digs) do res := res+op(i, digs)*10^(2*i-2) ; od ; RETURN(res) ; end: A078270 := proc(n) A078269(n)/11 ; end: for n from 1 to 20 do printf("%d, ", A078270(n)) ; od : - R. J. Mathar, Feb 27 2007

CROSSREFS

Cf. A078269.

Sequence in context: A098034 A109242 A165155 * A172175 A178906 A225374

Adjacent sequences:  A078267 A078268 A078269 * A078271 A078272 A078273

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 24 2002

EXTENSIONS

More terms from R. J. Mathar, Feb 27 2007

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified November 27 11:44 EST 2014. Contains 250196 sequences.