A147798 -id:A147798 - cp's OEIS frontend

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A147805 Least m coprime to 11 minimizing A007947(m*(11^n-m)).

Original entry on oeis.org

2, 1, 81, 16, 8748, 91, 1489347

Offset: 1

M. F. Hasler, Dec 06 2008

The values of the minima are given in A147798.

Cf. A007947, A147298, A147798, A147799, A147800, A147801, A147802, A147803, A147804.

/* If A147798(n) has already been computed and is stored in a147798[n]: */
A147805(n)={my(m=a147798[n]); for(a=1, n=11^n, a%11 || next; m>2*A007947(a) || next; m==A007947(a)*A007947(n-a) && return(a)) }
/* else use code from A147804 : A147805(n)=A147804(n,11) */

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