A317332 Indices m for which A058304(m) = 8.

9, 17, 22, 33, 41, 46, 54, 65, 73, 81, 86, 94, 105, 110, 118, 129, 137, 145, 150, 161, 169, 174, 182, 190, 201, 209, 214, 222, 233, 238, 246, 257, 265, 273, 278, 289, 297, 302, 310, 321, 329, 337, 342, 350, 361, 366, 374, 382, 393, 401, 406, 417, 425, 430, 438, 446, 457, 465, 470, 478, 489, 494, 502

Offset

1,1

Links

A.H.M. Smeets, Table of n, a(n) for n = 1..20000

Formula

a(n) = 8*n + A317335(n).

Prog

(Python)
n, f, i, p, q = 1, 1, 0, 0, 1
while i < 1000000:
....i, p, q = i+1, p*10, q*10
....if i == f:
........p, n = p+1, n+1
........f = f*n
n, a, j = 0, 0, 0
while p%q > 0:
....a, f, p, q = a+1, p//q, q, p%q
....if f == 8:
........n = n+1
........print(n, a-1)

Crossrefs

Cf. A058304, A317331, A317333, A317335, A317336.

Sequence in context: A133246 A190151 A144752 * A073160 A242987 A346146

Adjacent sequences: A317329 A317330 A317331 * A317333 A317334 A317335

Keyword

nonn

Author

A.H.M. Smeets, Jul 26 2018

Status

approved