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A244559
Numbers obtained by concatenating the squares of the digits of n!.
0
1, 4, 36, 416, 140, 4940, 250160, 160940, 936464640, 9364646400, 981811366400, 1649810013600, 3644490406400, 6449149644811400, 1904936491693664000, 408144496481646464000, 925253664491646408136000, 36160494994902549464000, 141361625100160646494000
OFFSET
1,2
FORMULA
a(n) = A048385(A000142(n)). - Michel Marcus, Jul 04 2014
EXAMPLE
For n = 7, 7! = 5040 and a(7) = 250160, which is the concatenation of the squares of the digits of 5040. For n=8, 8! = 40320 and a(8) = 160940.
PROG
(Magma) [StringToInteger(&cat[IntegerToString(h): h in Reverse([i^2: i in Intseq(Factorial(n))])]): n in [1..50]];
CROSSREFS
Sequence in context: A002894 A202828 A131765 * A319175 A317147 A371679
KEYWORD
nonn,base
AUTHOR
Vincenzo Librandi, Jul 03 2014
STATUS
approved