A179796 Numbers of the form abc + abd + acd + bcd, with 0 < a < b < c < d.

50, 61, 72, 78, 83, 92, 94, 105, 106, 107, 112, 116, 120, 126, 127, 129, 134, 138, 145, 146, 148, 149, 152, 153, 154, 160, 162, 163, 164, 171, 172, 176, 180, 182, 183, 190, 192, 193, 194, 197, 198, 199, 202, 204, 206, 207, 212, 214, 215, 216, 218, 221, 222

Offset: 1

Author

T. D. Noe, Aug 02 2010

Keywords

• nonn

Comments

All numbers greater than 181799 appear to be in this sequence. Complement of A179797.

Links

• MathOverflow, A generalisation of the equation n = ab + ac + bc