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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A112638 Power each digit individually according to its position and add the numbers. 0
2, 4, 16, 46, 196, 946, 8296, 65246, 385596, 1568346, 3925096, 17165846, 59491596, 333414346, 1000627096, 1003689846, 1013327596, 1019992346, 1099915096, 1899135846, 8291221596, 65211444346, 385412777096, 1566619439846, 3899692777596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

As the sequence tends to infinity the position of the units is always 6. The position of 10 is 4 or 9. And so on.

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

a(1)= 2

a(2)= 2^2 = 4

a(3)= 4^2 = 16

a(4)= 1^2 *10 + 6^2 = 10 + 36 = 46

a(5)= 4^2 *10 + 6^2 = 160 + 36 = 196

a(6)= 1^2 *100 + 9^2 *10 + 6^2 = 100 + 810 +36 = 946

PROG

(PARI) modN(n) = { local(resul, nshif, d) ; nshif = n; d = 0 ; resul = 0 ; while(nshif > 0, resul += 10^d* ((nshif % 10)^2) ; d++ ; nshif = floor(nshif/10) ; ) ; return(resul) ; } { an=2 ; print(an, ", ") ; for (n = 2, 30, an=modN(an) ; print(an, ", ") ; ) } - R. J. Mathar, Mar 15 2006

CROSSREFS

Sequence in context: A148279 A101061 A148280 * A077162 A128903 A103435

Adjacent sequences:  A112635 A112636 A112637 * A112639 A112640 A112641

KEYWORD

nonn,base

AUTHOR

Jorge Coveiro, Dec 27 2005

EXTENSIONS

More terms from R. J. Mathar, Mar 15 2006

STATUS

approved

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 26 09:53 EDT 2022. Contains 354086 sequences. (Running on oeis4.)