The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A339995 Numbers that are the sum of an odd cube and a nonzero even cube. 0
 9, 35, 65, 91, 133, 189, 217, 243, 341, 351, 407, 513, 539, 559, 637, 737, 793, 855, 945, 1001, 1027, 1125, 1241, 1339, 1343, 1395, 1547, 1729, 1755, 1843, 1853, 2071, 2205, 2261, 2331, 2413, 2457, 2709, 2745, 2771, 2869, 3059, 3087, 3197, 3383, 3439, 3473, 3591, 3887, 3925 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..50. EXAMPLE 35 is in the sequence since 2^3 + 3^3 = 8 + 27 = 35, where 8 is a nonzero even cube and 27 is an odd cube. MATHEMATICA Table[If[Sum[Sign[Mod[i, 2] Mod[n - i + 1, 2] + Mod[i + 1, 2] Mod[n - i, 2]] (Floor[i^(1/3)] - Floor[(i - 1)^(1/3)]) (Floor[(n - i)^(1/3)] - Floor[(n - i - 1)^(1/3)]), {i, Floor[n/2]}] > 0, n, {}], {n, 1200}] // Flatten CROSSREFS Cf. A010057. Sequence in context: A187554 A338010 A267702 * A085366 A304913 A173245 Adjacent sequences: A339992 A339993 A339994 * A339996 A339997 A339998 KEYWORD nonn AUTHOR Wesley Ivan Hurt, Dec 25 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 12 12:28 EDT 2024. Contains 375092 sequences. (Running on oeis4.)