A069973 (Sum of digits of n)^3 - (sum of digits of n^3).

0, 0, 0, 18, 54, 117, 207, 333, 504, 711, 0, 0, 9, 45, 108, 198, 324, 495, 711, 972, 0, 9, 45, 108, 198, 324, 486, 702, 981, 1305, 18, 36, 99, 189, 324, 486, 702, 981, 1305, 1701, 54, 99, 189, 315, 486, 711, 972, 1314, 1710, 2169, 117, 198, 324, 477, 702, 972

Offset

0,4

Comments

a(n) = 0 for n's: 1, 2, 10, 11, 20, 100, 101, 110, 111, 200, 1000, ....

Links

Table of n, a(n) for n=0..55.

Mathematica

f[n_] := Plus @@ IntegerDigits[n]^3 - Plus @@ (IntegerDigits[n^3]); Table[ f[n], {n, 0, 100}]

Crossrefs

Sequence in context: A044501 A163758 A232546 * A272138 A041630 A088593

Adjacent sequences: A069970 A069971 A069972 * A069974 A069975 A069976

Keyword

base,easy,nonn

Author

N. J. A. Sloane and Robert G. Wilson v, May 04 2002

Status

approved