Consider any concatenation of the type n = concat(a,b). Sequence lists numbers whose reverses are the sum of the products of some of such couples a and b.

A281555

Consider any concatenation of the type n = concat(a,b). Sequence lists numbers whose reverses are the sum of the products of some of such couples a and b.

Terms

    a(0) =351a(1) =621a(2) =886a(3) =1641a(4) =1901a(5) =2401a(6) =4122a(7) =4322a(8) =5101a(9) =6568a(10) =23913a(11) =30591a(12) =46649a(13) =60291a(14) =90877a(15) =199001a(16) =216322a(17) =223471a(18) =237391a(19) =297498a(20) =394391a(21) =405278a(22) =420552a(23) =425322a(24) =430762a(25) =456478a(26) =470149a(27) =546649a(28) =861226a(29) =910001

External references