A104795 Triangle T(n,k) = C(n,k)+1 for k<n; T(n,k) = 1 for k=n, read by rows.

1, 2, 1, 2, 3, 1, 2, 4, 4, 1, 2, 5, 7, 5, 1, 2, 6, 11, 11, 6, 1, 2, 7, 16, 21, 16, 7, 1, 2, 8, 22, 36, 36, 22, 8, 1, 2, 9, 29, 57, 71, 57, 29, 9, 1, 2, 10, 37, 85, 127, 127, 85, 37, 10, 1, 2, 11, 46, 121, 211, 253, 211, 121, 46, 11, 1, 2, 12, 56, 166, 331, 463, 463, 331, 166, 56, 12, 1

Offset

0,2

Links

Table of n, a(n) for n=0..77.

Example

First few rows of the triangle are:
1;
2, 1;
2, 3, 1;
2, 4, 4, 1;
2, 5, 7, 5, 1;
2, 6, 11, 11, 6, 1;
2, 7, 16, 21, 16, 7, 1;
2, 8, 22, 36, 36, 22, 8, 1;
...

Crossrefs

Row sums are in A006127. Cf. A007318.

Sequence in context: A259324 A216274 A145111 * A347570 A116925 A309010

Adjacent sequences: A104792 A104793 A104794 * A104796 A104797 A104798

Keyword

nonn,tabl

Author

Gary W. Adamson, Mar 26 2005

Extensions

Edited by Ralf Stephan, Apr 05 2009

a(28) = 28 replaced by 2, 8 by Georg Fischer, Apr 09 2022

Status

approved