A083957 - OEIS

%I #7 Apr 21 2024 22:30:05

%S 1,252,8864856,40638618022744,23098236228791472696480,

%T 1568841035670687222903484318855680,

%U 12397389650957442295025809189993580551236444160

%N a(n) = product of all cyclic permutation of concatenation of first n numbers. In each case the digits of a number are kept together for n>9.

%C Initial terms are {n(n+1)/2}*{A000042(n)}.

%e a(1) = 1, a(2) = 12*21 = 252, a(3) = 123*231*312 = 8864856.

%Y Cf. A000042, A083956.

%K base,nonn

%O 1,2

%A _Amarnath Murthy_, May 10 2003

%E More terms from _David Wasserman_, Dec 03 2004