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A078815 a(n) = A078215(n+1)/A078215(n). 2
1, 25, 121, 16, 121, 1089, 121, 1089, 1089, 1156, 1089, 1089, 1089, 1089, 1024, 1089, 10404, 1089, 1024, 1089, 1024, 10404, 10404, 10404, 10404, 10404, 10404, 10404, 1024, 10404, 10404, 1024, 10404, 1024, 1024, 10404, 1024, 1024, 1024, 1024, 1024 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..41.

PROG

(PARI) {print1(a=1, ", "); for(n=2, 41, k=floor(log(a)/log(10))+1; s=n; t=s+1; m=floor(log(s)/log(10))+1; d=k-m; s=s*10^d; t=t*10^d; b=1; while(b>0, q=floor(s/a); while(b>0&&(p=q*a)<t, if(p>=s&&issquare(p), print1(q, ", "); b=0, q++)); s=10*s; t=10*t); a=p)}

CROSSREFS

Cf. A078215, A078216.

Sequence in context: A218493 A124953 A126412 * A270368 A206472 A036057

Adjacent sequences:  A078812 A078813 A078814 * A078816 A078817 A078818

KEYWORD

base,nonn

AUTHOR

Klaus Brockhaus, Dec 06 2002

STATUS

approved

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Last modified April 8 14:29 EDT 2020. Contains 333314 sequences. (Running on oeis4.)