Numbers of the form d_1 d_2 d_3 ... where the sum of their digits multiplied by their digit positions is equal to their number of digits.
A381135
Numbers of the form d_1 d_2 d_3 ... where the sum of their digits multiplied by their digit positions is equal to their number of digits.
Terms
- a(0) =1a(1) =20a(2) =110a(3) =300a(4) =1010a(5) =2100a(6) =4000a(7) =10010a(8) =12000a(9) =20100a(10) =31000a(11) =50000a(12) =100010a(13) =111000a(14) =200100a(15) =220000a(16) =301000a(17) =410000a(18) =600000a(19) =1000010a(20) =1020000a(21) =1101000a(22) =1300000a(23) =2000100a(24) =2110000a(25) =3001000a(26) =3200000a(27) =4010000a(28) =5100000a(29) =7000000
External references
- oeis: A381135