A139180 Smallest number m greater than 1 such that m=(Sum_{i=1..k} d_i!)^n where d_1 d_2 ... d_k is the decimal expansion of m, or 0 if no m exists.

2, 172603687936, 3910825640696988096, 396867211295273131775761, 13586030059671762261567625351, 4218282992523473247642107344280879104, 5572272365289149102816175194628254483025277

Offset

1,1

Comments

A139181(n)=A139180(n)^(1/n).

Links

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

Example

172603687936=(1!+7!+2!+6!+0!+3!+6!+8!+7!+9!+3!+6!)^2

Crossrefs

Cf. A014080, A137604, A137605.

Sequence in context: A072293 A158343 A303008 * A072947 A077303 A185703

Adjacent sequences: A139177 A139178 A139179 * A139181 A139182 A139183

Keyword

base,nonn

Author

Farideh Firoozbakht, Apr 22 2008

Status

approved