cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A018863 Smallest power of 6 that begins with n.

Original entry on oeis.org

1, 216, 36, 46656, 50021738714629030177311081962496059484833406150976385567830453518336, 6, 7776, 80204967233062404407033075859456
Offset: 1

Views

Author

David W. Wilson

Keywords

Comments

a(9) = 6^176, approximately 9.007827639*10^136. - Alan Frank, Jan 28 2011
a(10) = 6^9 = 10077696. - N. J. A. Sloane, Jan 28 2011

Links

Crossrefs

Main sequence is A018864.
Cf. A018802 (k=2), A018857 (k=3), A018859 (k=4), A018861 (k=5), this sequence (k=6), A018865 (k=7), A018867 (k=8), A018869 (k=9).

Formula

a(n) = 6^A018864(n). - Seiichi Manyama, Jan 30 2017
a(6^n) = 6^n for n >= 0. - Seiichi Manyama, Jan 30 2017

A018862 5^a(n) is smallest power of 5 beginning with n.

Original entry on oeis.org

0, 2, 5, 11, 1, 4, 7, 50, 10, 63, 23, 3, 56, 26, 6, 69, 49, 29, 9, 82, 62, 42, 22, 12, 2, 75, 55, 45, 25, 15, 5, 88, 68, 58, 48, 38, 28, 18, 8, 91, 81, 71, 61, 51, 41, 31, 21, 11, 104, 94, 84, 74, 167, 64, 54, 44, 137, 34, 24, 117, 14, 4, 97, 87, 180, 77, 67, 160, 57, 150, 47, 37, 130
Offset: 1

Views

Author

David W. Wilson

Keywords

Links

Crossrefs

Cf. A018861.
Cf. A018858, A018860, A018864, A018866, A018868, A062525, A062526.

Programs

  • PARI
    a(n) = my(k=0, ss=Str(n)); while(strsplit(Str(5^k), ss)[1] != "", k++); k; \\ Michel Marcus, Aug 19 2025
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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