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A178334 Number of mountain numbers <= n. 5
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(n) = SUM(A178333(k): 0<=k<=n);

a(n) = 21846 for n >= 12345678987654321.

LINKS

R. Zumkeller, Table of n, a(n) for n = 0..20000

CROSSREFS

Cf. A135417.

Sequence in context: A103131 A112347 A057427 * A185016 A185015 A185014

Adjacent sequences:  A178331 A178332 A178333 * A178335 A178336 A178337

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 25 2010

STATUS

approved

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Last modified December 9 08:20 EST 2019. Contains 329877 sequences. (Running on oeis4.)