A115934 Numbers k such that k^4 contains a pandigital substring.

767, 1839, 1975, 2358, 2813, 3089, 3495, 3824, 4052, 5596, 5877, 6292, 6311, 6386, 6633, 6666, 6839, 6886, 7142, 7670, 8007, 8241, 9396, 9796, 10817, 10839, 11076, 11644, 14675, 15069, 15198, 15923, 16611, 16615, 16894, 17179, 17269, 17751

Offset

1,1

Links

Table of n, a(n) for n=1..38.

Example

6666^4 = 7197(4518637029)136.

Prog

(Python)
def haspan(s): return any(len(set(s[i:i+10]))==10 for i in range(len(s)-9))
print([m for m in range(20000) if haspan(str(m**4))]) # Michael S. Branicky, Feb 28 2021

Crossrefs

Cf. A115933, A115935, A115936, A115937, A115938.

Sequence in context: A234163 A159209 A045142 * A252072 A200856 A116301

Adjacent sequences: A115931 A115932 A115933 * A115935 A115936 A115937

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved