A102805 Let f(n) be the minimal number of distinct nonzero tetrahedral numbers that add to n (or -1 if n is not a sum of distinct tetrahedral numbers); sequence gives numbers n for which f(n) = 6.

126, 392, 402, 418, 439, 457, 464, 502, 538, 577, 587, 602, 612, 638, 657, 722, 793, 812, 822, 838, 863, 1007, 1062, 1198, 1408, 1423

Offset: 1

Author

Jud McCranie, Feb 26 2005

Keywords

• nonn

Comments

It appears that there are just two numbers n for which f(n) = 7, namely 412 and 622 and none with f(n) > 7.

Crossrefs

Cf. A000292, A104246, A102795, etc.