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A135417 Number of mountain numbers (see A134941) with n digits. 4
1, 0, 8, 56, 252, 784, 1792, 3108, 4166, 4352, 3544, 2232, 1068, 376, 92, 14, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

The total number is 21846.

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Contribution from Reinhard Zumkeller, May 25 2010: (Start)

a(1) = A178334(9) = 1;

a(2) = A178334(99) - A178334(9) = 1 - 1 = 0;

a(3) = A178334(999) - A178334(99) = 9 - 1 = 8;

a(4) = A178334(9999) - A178334(999) = 65 - 9 = 56. (End)

CROSSREFS

Sequence in context: A073831 A168013 A003210 * A248332 A336906 A334332

Adjacent sequences:  A135414 A135415 A135416 * A135418 A135419 A135420

KEYWORD

base,nonn,fini,full

AUTHOR

Suggested by Jonathan Vos Post, Nov 24 2007 and computed by Hans Havermann and Joshua Zucker, Nov 25 2007

STATUS

approved

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Last modified December 1 14:10 EST 2021. Contains 349430 sequences. (Running on oeis4.)