A038855 - OEIS

A038855

Numbers that are divisible by 7 and are differences between two cubes in at least one way.

7, 56, 63, 91, 98, 189, 217, 448, 469, 504, 511, 602, 665, 721, 728, 784, 819, 875, 973, 1141, 1197, 1267, 1323, 1330, 1512, 1519, 1603, 1701, 1736, 1946, 1981, 2044, 2072, 2107, 2170, 2401, 2457, 2611, 2646, 2716, 2765, 2863, 3087, 3185, 3311, 3367

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..46.

PROG

(PARI) v=vector(3367); for(i=1, 33, for(j=i+1, 34, d=j^3-i^3; if(d<=3367, v[d]++, next(2)))); forstep(n=7, 3367, 7, if(v[n]>0, print1(n ", "))) \\ Donovan Johnson, Dec 31 2013

CROSSREFS

Sequence in context: A009521 A116120 A056719 * A097254 A043911 A044526

Adjacent sequences: A038852 A038853 A038854 * A038856 A038857 A038858

KEYWORD

nonn

AUTHOR

Jeff Burch

EXTENSIONS

2014 changed to 2044 by Donovan Johnson, Dec 31 2013

STATUS

approved