Numbers x such that x = concat(a, b) and a' * b' = x, where a' and b' are the arithmetic derivatives of a and b.

A259851

Numbers x such that x = concat(a, b) and a' * b' = x, where a' and b' are the arithmetic derivatives of a and b.

Terms

    a(0) =48a(1) =448a(2) =708a(3) =6560a(4) =279207a(5) =350400a(6) =1050000a(7) =1837500a(8) =2480128a(9) =2600000a(10) =4687500a(11) =7562500a(12) =10762500a(13) =25712000a(14) =27337500a(15) =28650000a(16) =34912500a(17) =57450000a(18) =62568960a(19) =65312500a(20) =65871440a(21) =106505392a(22) =153456128a(23) =213939328a(24) =245600000a(25) =258332000a(26) =281600000a(27) =285650000

External references