A317336 a(n) = A317333(n) - 8*n.

-7, -10, -10, -7, -10, -10, -7, -7, -10, -10, -10, -7, -7, -10, -7, -7, -10, -10, -10, -7, -10, -10, -7, -7, -7, -10, -10, -7, -7, -10, -7, -7, -10, -10, -10, -7, -10, -10, -7, -7, -10, -10, -10, -7, -7, -10, -7, -7, -7, -10, -10, -7, -10, -10, -7, -7, -7, -10, -10, -7, -7, -10, -7, -7

Offset

1,1

Links

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

Index entries for sequences obtained by enumerating foldings

Formula

a(4*n+4) = -7, a(4*n+2) = -10, for n > 0. a(1) = -7 and a(2*n-1) = a(n) for n > 1.

abs(a(n+2)+8) = A014710(n) for n >= 0.

a(n) = -7-3*A082410(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 == 9:
        n = n + 1
        print(n, a - 1 - 8 * n)

Crossrefs

Cf. A014710, A082410, A317331, A317332, A317333, A317335.

Sequence in context: A010730 A225694 A247191 * A079004 A265311 A192268

Adjacent sequences: A317333 A317334 A317335 * A317337 A317338 A317339

Keyword

sign

Author

A.H.M. Smeets, Jul 26 2018

Status

approved