A278816 Numbers that can be produced from their own digits by applying one or more of the eight operations {+, -, *, /, sqrt(), ^, !, concat11()}, with no operation used more than once, where "concat11()" means the operation of concatenating two single digits.

0, 1, 2, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84

Offset: 1

Author

José de Jesús Camacho Medina, Nov 28 2016

Keywords

• nonn
• base

Comments

Extending the sequence will soon become impractical without a program to check every possible way to apply one or more of the eight operations. - Editors, Dec 03 2016

Examples

			    0 is a term because      sqrt(0) = 0;
   24 is a term because (2+sqrt(4))! = 24;
   25 is a term because          5^2 = 25;
  343 is a term because      (3+4)^3 = 343.
		

Links

• Matematico Fresnillense, Reto Matematico Interesante (In Spanish).