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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

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

Cf. A000142, A048385.

Sequence in context: A002894 A202828 A131765 * A319175 A317147 A132864

Adjacent sequences:  A244556 A244557 A244558 * A244560 A244561 A244562

KEYWORD

nonn,base

AUTHOR

Vincenzo Librandi, Jul 03 2014

STATUS

approved

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)