login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038856 Numbers n such that n ends with '1' and is difference between two cubes in at least one way. 0
61, 91, 271, 331, 511, 631, 721, 1141, 1261, 1701, 1801, 1951, 1981, 2401, 2611, 2791, 3311, 3571, 3781, 3971, 4401, 4501, 4681, 4921, 5131, 5831, 5941, 6211, 6851, 7271, 7351, 7651, 8071, 8261, 8451, 8911, 9241, 10621, 10981, 11951, 12481, 12691, 12871 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

MATHEMATICA

f2[upto_]:=Module[{maxno=Floor[(3+Sqrt[12*upto-3])/6]}, Select[Union[Last[#]-First[#]&/@Subsets[Range[maxno]^3, {2}]], #<=upto&&Last[IntegerDigits[#]]==1&]]; f[13000] (* Harvey P. Dale, Mar 03 2011 *)

CROSSREFS

Sequence in context: A047272 A123207 A309180 * A144970 A045562 A104229

Adjacent sequences:  A038853 A038854 A038855 * A038857 A038858 A038859

KEYWORD

nonn,base

AUTHOR

Jeff Burch

EXTENSIONS

Corrected and extended by Ray Chandler, Nov 29 2008

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 November 21 11:35 EST 2019. Contains 329370 sequences. (Running on oeis4.)