Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.
A239563
Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.
Terms
- a(0) =23a(1) =47a(2) =139a(3) =529a(4) =611a(5) =911a(6) =1109a(7) =1445a(8) =1621a(9) =2003a(10) =2521a(11) =2531a(12) =4007a(13) =4361a(14) =4879a(15) =7169a(16) =9011a(17) =9013a(18) =9481a(19) =13009a(20) =18883a(21) =22081a(22) =24257a(23) =25031a(24) =45349a(25) =49901a(26) =56081a(27) =90011a(28) =98941a(29) =99101
External references
- oeis: A239563