A141742 Starting from the 1 in the first line of triangle A141728 choose one of the three digits below it. Repeat down to the other rows. Sequence gives the numbers in base 10 expressed by the collected digits that cannot be reached following any possible path.

3, 6, 7, 12, 13, 14, 15, 24, 25, 26, 27, 28, 29, 30

Offset

0,1

Links

Table of n, a(n) for n=0..13.

Example

Below the 1 in the first row we have three 0. Therefore we cannot have "11", 3 in base 10.

Crossrefs

Cf. A141727 - A141741, A141743 - A141746.

Sequence in context: A333001 A092150 A028802 * A004755 A004760 A186083

Adjacent sequences: A141739 A141740 A141741 * A141743 A141744 A141745

Keyword

easy,nonn

Author

Paolo P. Lava and Giorgio Balzarotti, Jul 07 2008

Status

approved