login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A216556 Concatenate decimal digits of n, each increased by 1. 5
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22, 23, 24, 25, 26, 27, 28, 29, 210, 31, 32, 33, 34, 35, 36, 37, 38, 39, 310, 41, 42, 43, 44, 45, 46, 47, 48, 49, 410, 51, 52, 53, 54, 55, 56, 57, 58, 59, 510, 61, 62, 63, 64, 65, 66, 67, 68, 69, 610, 71, 72, 73, 74, 75, 76, 77 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

In all of the terms, a digit '0' can only occur preceded by a digit '1', and an initial digit '1' can only appear followed by a '0'.

Sequence A216589 lists the complement of the range of this map.

This is an injective map, A216587 is its left inverse. - M. F. Hasler, Sep 09 2012

LINKS

Michael De Vlieger, Table of n, a(n) for n = 0..10000

E. Angelini, Strings resurrection, SeqFan mailing list, Sep 08 2012.

EXAMPLE

a(19) = concat(1+1,9+1) = 210.

MATHEMATICA

Array[FromDigits@ Flatten[IntegerDigits[#] + 1 /. 10 -> {1, 0}] &, 91, 0] (* Michael De Vlieger, Jan 04 2020 *)

PROG

(PARI)  A216556(n)={my(t=1); until(n<t*=10, (n+=t)\t%10||n+=(n-t)\(t*=10)*9*t); n}

CROSSREFS

Cf. A216557, A216587, A216589.

Sequence in context: A306361 A068861 A256079 * A331975 A068860 A158699

Adjacent sequences:  A216553 A216554 A216555 * A216557 A216558 A216559

KEYWORD

nonn,easy,base

AUTHOR

M. F. Hasler, Sep 08 2012

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 February 27 12:22 EST 2020. Contains 332306 sequences. (Running on oeis4.)