A291670 Numbers k such that 2 is the smallest decimal digit of k^4.

4, 5, 22, 72, 74, 128, 138, 154, 244, 256, 272, 292, 388, 404, 426, 434, 494, 506, 542, 562, 718, 756, 818, 868, 876, 1266, 1344, 1372, 1376, 1434, 1442, 1512, 1524, 1562, 1606, 1766, 1776, 2222, 2268, 2278, 2292, 2306, 2338, 2392, 2396, 2426, 2474, 2574

Offset

1,1

Links

Table of n, a(n) for n=1..48.

Example

5 is in the sequence because 5^4 = 625, the smallest decimal digit of which is 2.

Prog

(PARI) select(k->vecmin(digits(k^4))==2, vector(10000, k, k))

Crossrefs

Cf. A291668, A291669, A291671, A291672.

Sequence in context: A091130 A141447 A129346 * A176957 A341586 A010302

Adjacent sequences: A291667 A291668 A291669 * A291671 A291672 A291673

Keyword

nonn,base

Author

Colin Barker, Aug 29 2017

Status

approved