A038492 Sums of 2 distinct powers of 12.

13, 145, 156, 1729, 1740, 1872, 20737, 20748, 20880, 22464, 248833, 248844, 248976, 250560, 269568, 2985985, 2985996, 2986128, 2987712, 3006720, 3234816, 35831809, 35831820, 35831952, 35833536, 35852544, 36080640, 38817792, 429981697, 429981708, 429981840, 429983424, 430002432, 430230528

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

Take[Union[Plus@@@Subsets[12^Range[0, 20], {2}]], 50] (* Harvey P. Dale, Dec 16 2010 *)

Prog

(Python)
from math import isqrt
def A038492(n): return 12**(m:=isqrt(n<<3)+1>>1)+12**(n-1-(m*(m-1)>>1)) # Chai Wah Wu, Apr 04 2025

Crossrefs

Base-12 interpretation of A038444.

Cf. A001021, A038493.

Sequence in context: A064525 A065411 A354466 * A270579 A297223 A387208

Adjacent sequences: A038489 A038490 A038491 * A038493 A038494 A038495

Keyword

nonn,easy

Author

Olivier Gérard

Extensions

More terms from Vincenzo Librandi, Aug 06 2009

Offset corrected by Amiram Eldar, Jul 14 2022

Status

approved