login
A118659
Minimum number of unit faces required to construct n unit cubes.
1
6, 11, 16, 20, 25, 29, 33, 36, 41, 45, 49, 52, 57, 61, 65, 68, 72, 75, 80, 84, 88, 91, 95, 98, 102, 105, 108, 113, 117, 121, 124, 128, 131, 135, 138, 141, 146, 150, 154, 157, 161, 164, 168, 171, 174, 178, 181, 184, 189, 193, 197, 200, 204, 207, 211, 214, 217, 221, 224
OFFSET
1,1
FORMULA
a(n^3) = 3*(n^2)*(n+1) = A270205(n+1). - Mohammed Yaseen, Aug 22 2021
EXAMPLE
a(2)=11 because 6 unit faces are required to construct each cube but 1 face is shared. I.e., a(2)=6+5=11.
CROSSREFS
Sequence in context: A315447 A315448 A315449 * A315450 A315451 A072353
KEYWORD
easy,nonn
AUTHOR
Ron R. King, May 18 2006
EXTENSIONS
Missing term a(56)=214 inserted by Mohammed Yaseen, Aug 22 2021
STATUS
approved