A083957 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.

1, 252, 8864856, 40638618022744, 23098236228791472696480, 1568841035670687222903484318855680, 12397389650957442295025809189993580551236444160

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A000042, A083956.

Sequence in context: A068275 A068287 A229777 * A172656 A172760 A172831

Adjacent sequences: A083954 A083955 A083956 * A083958 A083959 A083960

Keyword

base,nonn

Author

Amarnath Murthy, May 10 2003

Extensions

More terms from David Wasserman, Dec 03 2004

Status

approved