a(n) = n * next number greater than n with same first digit as n.

Terms

a(0) =10a(1) =40a(2) =90a(3) =160a(4) =250a(5) =360a(6) =490a(7) =640a(8) =810a(9) =110a(10) =132a(11) =156a(12) =182a(13) =210a(14) =240a(15) =272a(16) =306a(17) =342a(18) =1900a(19) =420a(20) =462a(21) =506a(22) =552a(23) =600a(24) =650a(25) =702a(26) =756a(27) =812a(28) =5800a(29) =930