A048367 a(n)^3 is smallest cube containing exactly n 2's.

3, 28, 138, 587, 612, 2824, 27654, 29603, 131468, 1312748, 1616488, 2811574, 49629974, 139796852, 281986403, 1264554822, 6146857824, 16162692208, 60598584603, 229717543765, 606069984352, 2811738231378, 5869673191741

Offset

1,1

Links

Table of n, a(n) for n=1..23.

Eric Weisstein's World of Mathematics, Cubic Number

Mathematica

a[n_] := Module[{i}, i = 1; While[DigitCount[i^3][[2]] != n, i++ ]; i]; (* Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 23 2006 *)

Crossrefs

Cf. A036529, A048365, A048366, A048368, A048369, A048370, A048371, A048372, A048373, A048374.

Sequence in context: A100019 A053132 A316390 * A095665 A145346 A184440

Adjacent sequences: A048364 A048365 A048366 * A048368 A048369 A048370

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 1999

Extensions

a(14) from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 23 2006

a(15)-a(20) from Lars Blomberg, Jun 12 2011

a(21)-a(22) from Giovanni Resta, Jun 29 2018

a(23) from Giovanni Resta, Mar 27 2020

Status

approved