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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A246515 a(n) such that the series 1/((1-x^a(1))(1-x^a(2))...)=1+x+x^8+x^27+...+x^(j^3)+... when read mod 2. 0
1, 2, 4, 9, 10, 11, 12, 13, 14, 15, 18, 19, 22, 23, 25, 26, 27, 30, 37, 38, 40, 41, 42, 44, 45, 48, 51, 52, 53, 54, 55, 56, 58, 59, 64, 67, 68, 70, 71, 72, 73, 74, 79, 82, 83, 84, 86, 88, 89, 93 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

iend=150;

aim=CoefficientList[Sum[x^(i^3), {i, 0, iend^(1/3)+1}], x];

c[1]=1;

index=1;

For[i=1, i<iend, i++,

ser=Mod[CoefficientList[Series[1/( Product[(1-x^c[j]), {j, 1, index}] ), {x, 0, iend+1}], x], 2];

If[ser[[i+2]]!=aim[[i+2]], c[index+1]=i+1; index++]

];

Table[c[i], {i, 1, 50}]

CROSSREFS

Sequence in context: A279035 A076661 A258710 * A275658 A267414 A072583

Adjacent sequences:  A246512 A246513 A246514 * A246516 A246517 A246518

KEYWORD

nonn

AUTHOR

David S. Newman, Aug 28 2014

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 20 08:50 EDT 2018. Contains 313914 sequences. (Running on oeis4.)