A116147 - OEIS

%I #8 Jul 20 2021 23:45:15

%S 4962,237412345332,262912791034,468307643502

%N Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 9.

%C Also, numbers k such that k concatenated with k+6 gives the product of two numbers which differ by 7.

%e 4962//4960 = 7040 * 7049, where // denotes concatenation.

%Y Cf. A116140, A116146, A116153, A116278.

%Y Cf. A116195, A116200, A116202, A116209, A116332.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

%E Edited by _N. J. A. Sloane_ at the suggestion of Eric Desbiaux, Mar 23 2008