All possible products in increasing order of two distinct members of the unary sequence 1, 11, 111, 1111, 11111, ...given by A000042.

A077488

All possible products in increasing order of two distinct members of the unary sequence 1, 11, 111, 1111, 11111, ...given by A000042.

Terms

    a(0) =11a(1) =111a(2) =1111a(3) =1221a(4) =11111a(5) =12221a(6) =111111a(7) =122221a(8) =123321a(9) =1111111a(10) =1222221a(11) =1233321a(12) =11111111a(13) =12222221a(14) =12333321a(15) =12344321a(16) =111111111a(17) =122222221a(18) =123333321a(19) =123444321a(20) =1111111111a(21) =1222222221a(22) =1233333321a(23) =1234444321

External references