A273555 a(n) = A001235(n) - floor(A001235(n)^(1/3))^3.

1, 8, 8, 1000, 64, 8, 729, 27, 232, 1728, 64, 216, 1728, 512, 8000, 4913, 729, 27, 125, 512, 64, 5832, 13331, 216, 13580, 125, 4913, 1000, 1856, 3375, 13824, 7073, 343, 2547, 8, 1331, 12167, 512, 1728, 8000, 13824, 13768, 24389, 9736, 16496, 216, 12167, 13824, 19683, 1

Offset

1,2

Comments

Noncube terms of this sequence are 232, 13331, 13580, 1856, 7073, 2547, ...

How is the distribution of noncube terms in this sequence? See also A273592 that is related with this question.

Links

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

Formula

a(n) = A055400(A001235(n)). - Michel Marcus, May 25 2016

Prog

(PARI) T = thueinit(x^3+1, 1);
isA001235(n) = my(v=thue(T, n)); sum(i=1, #v, v[i][1]>=0 && v[i][2]>=v[i][1])>1;
lista(nn) = for(n=1, nn, if(isA001235(n), print1(n-sqrtnint(n, 3)^3, ", ")));

Crossrefs

Cf. A001235, A055400, A273592.

Sequence in context: A059196 A027504 A078247 * A213153 A132038 A087495

Adjacent sequences: A273552 A273553 A273554 * A273556 A273557 A273558

Keyword

nonn

Author

Altug Alkan, May 25 2016

Status

approved