A102279 - OEIS

A102279

Numbers n such that n = phi(d_1)!*phi(d_2)!* ... *phi(d_k)! where d_1 d_2 ... d_k is the decimal expansion of n and assume that phi(0)=0.

1, 48, 720, 17280, 17915904000, 479219999055934390272000000000

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OFFSET

1,2

COMMENTS

All terms are of the form 2^i*3^j*5^t.

No more terms < 10^100. - David Wasserman, Apr 03 2008

LINKS

EXAMPLE

17280 is in the sequence because 17280 = phi(1)!*phi(7)!*phi(2)!*phi(8)!*phi(0)!.

CROSSREFS

KEYWORD

base,less,nonn

AUTHOR

STATUS

approved