A103953 Smallest perfect power b^e such that b^e+n is also a perfect power, or 0 if no such perfect power exists.

8, 25, 1, 4, 4, 0, 1, 1, 16, 2187, 16, 4, 36, 0, 1, 9, 8, 9, 8, 16, 4, 27, 4, 1, 100, 1, 9, 4, 196, 6859, 1, 4, 16, 0, 1, 64, 27, 1331, 25, 9, 8, 0, 441, 81, 4, 243, 81, 1, 32, 0, 49, 144, 676, 27, 9, 8, 64, 0, 841, 4, 64, 0, 1, 36, 16, 0, 1089

Offset

1,1

Comments

a(A074981(n)) = 0.

Links

Table of n, a(n) for n=1..67.

Formula

a(n) = A074954(n)-n, if A074954(n)>0; a(n)=0, if A074954(n)=0.

Crossrefs

Cf. A074954, A001597, A076444, A023056.

Sequence in context: A274303 A132586 A208400 * A076444 A023056 A103954

Adjacent sequences: A103950 A103951 A103952 * A103954 A103955 A103956

Keyword

nonn

Author

Max Alekseyev, Feb 22 2005

Extensions

Offset corrected by Mohammed Yaseen, Aug 09 2023

Status

approved