The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A081932 Sum of n-th row of A081930. 3

%I #7 Aug 07 2015 03:09:21

%S 1,33,333,4664,51005,616506,7021007,80308008,900360009,10004950010,

%T 110005510011

%N Sum of n-th row of A081930.

%p isA002113 := proc(n) local digrev,d ; digrev := convert(n,base,10) ; for d from 1 to nops(digrev)/2 do if op(d,digrev) <> op(-d,digrev) then RETURN(false) ; fi ; od ; RETURN(true) ; end: A081930 := proc(n) local a,k ; a := [] ; k := 10^(n-1) ; while nops(a) < n do if isA002113(k) then a := [op(a),k] ; fi ; k := k+1 ; od ; RETURN(a) ; end: A081932 := proc(n) local nrow,i ; nrow := A081930(n) ; add(op(i,nrow),i=1..nops(nrow)) ; end: for n from 1 to 18 do A081932(n) ; od ; # _R. J. Mathar_, Apr 05 2007

%Y Cf. A081930, A081931.

%K base,more,nonn

%O 1,2

%A _Amarnath Murthy_, Apr 01 2003

%E More terms from _R. J. Mathar_, Apr 05 2007

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

Last modified November 29 12:41 EST 2023. Contains 367445 sequences. (Running on oeis4.)