Numbers k such that the sum of digits of k equals the concatenation of the distinct prime divisors of k.
A212667
Numbers k such that the sum of digits of k equals the concatenation of the distinct prime divisors of k.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =7a(4) =2401a(5) =4913a(6) =655360a(7) =3906250a(8) =6553600a(9) =39062500a(10) =41943040a(11) =65536000a(12) =390625000a(13) =419430400a(14) =655360000a(15) =3906250000a(16) =4194304000a(17) =6553600000a(18) =27512614111a(19) =39062500000a(20) =41943040000a(21) =65536000000a(22) =271818611107a(23) =390625000000a(24) =419430400000
External references
- oeis: A212667