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A071678 GCD of n! and the reverse of n!. 0
1, 2, 6, 6, 3, 9, 45, 1152, 189, 189, 99, 594, 594, 198, 99, 198, 99, 594, 99, 378378, 45045, 99, 396, 30294, 2279277, 14256, 3267, 1089, 6336, 9702, 20196, 6534, 396, 11088, 20117097, 99, 99, 6318675, 594, 21978, 1089, 297, 2178, 594, 1683, 1485 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..46.

FORMULA

a(n)=A055483[n! ]

EXAMPLE

n=7, a(7)=GCD[5040,405]=45.

MATHEMATICA

nd[x_, y_] := 10*x+y tn[x_] := Fold[nd, 0, x] ed[x_] := IntegerDigits[x] red[x_] := Reverse[IntegerDigits[x]] Table[GCD[w!, tn[red[w! ]]], {w, 1, 128}]

CROSSREFS

Cf. A055483.

Sequence in context: A136696 A086358 A004152 * A316164 A319276 A141329

Adjacent sequences:  A071675 A071676 A071677 * A071679 A071680 A071681

KEYWORD

base,nonn

AUTHOR

Labos Elemer, May 31 2002

STATUS

approved

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Last modified October 23 17:32 EDT 2019. Contains 328373 sequences. (Running on oeis4.)