Positive numbers for which the product of digits is equal to the power tower of digits (right-associative).
A321990
Positive numbers for which the product of digits is equal to the power tower of digits (right-associative).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =11a(10) =21a(11) =22a(12) =31a(13) =41a(14) =51a(15) =61a(16) =71a(17) =81a(18) =91a(19) =111a(20) =211a(21) =221a(22) =311a(23) =411a(24) =511a(25) =611a(26) =711a(27) =811a(28) =911a(29) =1111
External references
- oeis: A321990