A178912 Number of generalized mountain numbers (see A134853) with n digits.

9, 0, 240, 1380, 4578, 10794, 19494, 27912, 32195, 30085, 22748, 13820, 6656, 2486, 695, 137, 17, 1

Offset

1,1

Comments

The total number of generalized mountain numbers is 173247.

Links

Table of n, a(n) for n=1..18.

Example

a(18) = 1 because there is exactly one generalized mountain number with 18 digits: 123456789876543210

Crossrefs

Cf. A134853, A134941, A135417

Sequence in context: A157309 A215484 A177145 * A191564 A067479 A308803

Adjacent sequences: A178909 A178910 A178911 * A178913 A178914 A178915

Keyword

base,nonn,fini,full

Author

Nathaniel Johnston, Dec 29 2010

Status

approved