A291669 Numbers k such that 1 is the smallest decimal digit of k^4.

1, 2, 3, 6, 9, 11, 13, 14, 17, 21, 23, 24, 27, 28, 31, 33, 34, 36, 37, 39, 41, 42, 47, 52, 58, 59, 61, 62, 63, 64, 66, 68, 69, 71, 73, 76, 82, 83, 84, 87, 89, 91, 92, 97, 98, 104, 106, 109, 112, 117, 118, 121, 122, 123, 124, 129, 131, 134, 137, 141, 144, 146

Offset

1,2

Links

Table of n, a(n) for n=1..62.

Example

2 is in the sequence because 2^4 = 16, the smallest decimal digit of which is 1.

Mathematica

Select[Range[200], Min[IntegerDigits[#^4]]==1&] (* Harvey P. Dale, Jun 07 2021 *)

Prog

(PARI) select(k->vecmin(digits(k^4))==1, vector(500, k, k))

Crossrefs

Cf. A291668, A291670, A291671, A291672.

Sequence in context: A189708 A127590 A118730 * A097384 A067886 A227000

Adjacent sequences: A291666 A291667 A291668 * A291670 A291671 A291672

Keyword

nonn,base

Author

Colin Barker, Aug 29 2017

Status

approved