A034117 Fractional part of cube root of a(n) starts with digit 1.

10, 30, 31, 32, 69, 70, 71, 72, 73, 74, 133, 134, 135, 136, 137, 138, 139, 140, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 532, 533, 534, 535, 536, 537, 538, 539

Offset

1,1

Links

Table of n, a(n) for n=1..54.

Prog

(Python)
from sympy import integer_nthroot
def ok(n): return integer_nthroot(1000*n, 3)[0]%10 == 1
print([k for k in range(540) if ok(k)]) # Michael S. Branicky, Oct 30 2021

Crossrefs

Cf. A034127.

Sequence in context: A057456 A002422 A031195 * A104863 A376639 A362047

Adjacent sequences: A034114 A034115 A034116 * A034118 A034119 A034120

Keyword

nonn,easy,base

Author

Patrick De Geest, Sep 15 1998

Status

approved