|
Search: id:A102255
|
|
|
| A102255 |
|
Slowest increasing sequence beginning with 3 whose digits satisfy the rule d*2. |
|
+0
1
|
|
| 3, 6, 12, 24, 48, 81, 616, 2122, 12424, 42484, 88481, 681616, 816212, 1621221, 2162124, 2421242, 4424212, 42484842, 48488484, 248481681, 684816816, 1681684816, 8162121621, 21681621216, 212212162121, 681621216212
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Same digits as A102254
|
|
FORMULA
|
d*2, beginning with 3
|
|
EXAMPLE
|
Read a(6)=81 which produces a(7)=162 because 8*2=16 and 1*2=2
|
|
MATHEMATICA
|
t = Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[2IntegerDigits[x]]]], 3, 15]]; a = 0; l = {}; Do[k = 1; While[fd = FromDigits[ Take[t, k]]; a > fd, k++ ]; t = Drop[t, k]; AppendTo[l, fd]; a = fd, {n, 27}]; l (from Robert G. Wilson v Feb 21 2005)
|
|
CROSSREFS
|
Sequence in context: A068032 A048719 A115807 this_sequence A002910 A001668 A080616
Adjacent sequences: A102252 A102253 A102254 this_sequence A102256 A102257 A102258
|
|
KEYWORD
|
base,easy,nonn
|
|
AUTHOR
|
Alexandre Wajnberg & Eric Angelini (alexandre.wajnberg(AT)ulb.ac.be), Feb 18 2005
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 21 2005
|
|
|
Search completed in 0.002 seconds
|
