A018872 a(n)^5 is smallest fifth power beginning with n.

0, 1, 3, 2, 21, 9, 23, 6, 61, 25, 4, 26, 66, 42, 17, 69, 7, 28, 18, 72, 29, 116, 47, 75, 3, 48, 192, 77, 31, 124, 79, 5, 2, 32, 51, 129, 205, 13, 52, 33, 21, 53, 212, 134, 85, 34, 136, 86, 137, 87, 55, 22, 35, 14, 352, 56, 224, 142, 226, 9, 36, 144, 91, 363, 23, 58, 146, 232, 147, 37

Offset

0,3

Links

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

Formula

a(n^5) = n for n >= 0. - Seiichi Manyama, Jan 30 2017

Prog

(PARI) a(n) = my(k=0, ss=Str(n)); while(strsplit(Str(k^5), ss)[1] != "", k++); k; \\ Michel Marcus, Aug 19 2025

Crossrefs

Cf. A018851 (k=2), A018852 (k=3), A018853 (k=4), this sequence (k=5), A018874 (k=6), A018876 (k=7), A018878 (k=8), A018880 (k=9), A018882 (k=10).

Sequence in context: A323780 A350290 A248123 * A329441 A151429 A355290

Adjacent sequences: A018869 A018870 A018871 * A018873 A018874 A018875

Keyword

nonn,base

Author

David W. Wilson

Extensions

Added initial 0. - Seiichi Manyama, Jan 30 2017

Status

approved