OFFSET
1,1
COMMENTS
For values of a, see A099148.
EXAMPLE
From R. J. Mathar, Oct 10 2017 (Start)
Values of a, then b, then f(a)+f(b) and concatenations (first a, then b or first b, then a), sorted on b, are:
0 0 0+0=0
2 5 5+20=25
3 6 9+27=36
8 8 44+44=88
8 9 44+54=98
6 14 27+119=146
5 15 20+135=155
0 17 0+170=170
20 59 230+1829=2059
39 78 819+3159=3978
98 98 4949+4949=9898
98 99 4949+5049=9998
78 158 3159+12719=15878
59 177 1829+15930=17759
77 384 3080+74304=77384
138 506 9729+128777=138506
200 599 20300+180299=200599
399 798 80199+319599=399798
492 860 121770+371090=492860
614 921 189419+425502=614921
998 998 499499+499499=998998
998 999 499499+500499=999998
921 1383 425502+958419=1383921
860 1505 371090+1134770=1505860
798 1598 319599+1279199=1598798
599 1797 180299+1617300=1797599
164 1803 13694+1628109=1641803
506 1859 128777+1730729=1859506
384 1920 74304+1846080=1920384
2000 5999 2003000+18002999=20005999
2655 6785 3528495+23028290=26556785
3213 7343 5166504+26970839=32137343
3999 7998 8001999+31995999=39997998
(End)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
John W. Layman, Sep 30 2004
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 23 2010
STATUS
approved