Primordial LB numbers: LB numbers (A267856) that are not of the form 10*n where n is also an LB number.

A268269

Primordial LB numbers: LB numbers (A267856) that are not of the form 10*n where n is also an LB number.

Terms

    a(0) =250a(1) =375a(2) =648a(3) =972a(4) =2430a(5) =6750a(6) =9375a(7) =36450a(8) =60750a(9) =84672a(10) =546750a(11) =8346672a(12) =12605250a(13) =18907875a(14) =26406250a(15) =31513125a(16) =39609375a(17) =44118375a(18) =53466750a(19) =69328875a(20) =81934125a(21) =107144625a(22) =119749875a(23) =144960375a(24) =182776125a(25) =195381375a(26) =233197125a(27) =555644448a(28) =579296448a(29) =774927552

External references