A018878 a(n)^8 is smallest eighth power beginning with n.

0, 1, 2, 5, 9, 7, 3, 23, 13, 42, 10, 18, 58, 78, 14, 25, 6, 34, 81, 61, 26, 11, 35, 47, 63, 2, 113, 85, 27, 86, 115, 65, 87, 49, 277, 37, 66, 21, 158, 5, 67, 283, 12, 9, 286, 51, 287, 91, 289, 122, 29, 69, 123, 39, 22, 93, 221, 7, 222, 125, 94, 223, 53, 126, 71, 3, 95, 127, 226, 17

Offset

0,3

Comments

a(2)=2, because 2^8=256 is the first 8th power with the most significant decimal digit equal to 2;

a(16)=6, because 6^8=1679616 is the first 8th power with two most significant decimal digits equal to 16.

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Formula

a(n^8) = n for n >= 0. - Seiichi Manyama, Jan 30 2017

Crossrefs

Cf. A018851 (k=2), A018852 (k=3), A018853 (k=4), A018872 (k=5), A018874 (k=6), A018876 (k=7), this sequence (k=8), A018880 (k=9), A018882 (k=10).

Sequence in context: A204913 A198455 A339174 * A021389 A198429 A089578

Adjacent sequences: A018875 A018876 A018877 * A018879 A018880 A018881

Keyword

nonn,base

Author

David W. Wilson

Extensions

Added initial 0. - Seiichi Manyama, Jan 30 2017

Status

approved