A052175 Triangle of numbers arising in enumeration of walks on square lattice.

1, 2, 2, 4, 10, 8, 10, 34, 16, 70, 98, 32, 70, 308, 258, 64, 588, 1092, 642, 128, 588, 3024, 3414, 1538, 256, 5544, 12276, 9834, 3586, 512, 5544, 31680, 43230, 26752, 8194, 1024, 56628, 141570, 138424, 69784, 18434, 2048

Offset

0,2

Links

Table of n, a(n) for n=0..41.

R. K. Guy, Catwalks, sandsteps and Pascal pyramids, J. Integer Sequences, Vol. 3 (2000), Article #00.1.6.

Example

1; 2; 2,4; 10,8; 10,34,16; 70,98,32; 70,308,258,64; ...

Crossrefs

Essentially same as A052176.

Sequence in context: A162508 A199400 A056919 * A102623 A216695 A320069

Adjacent sequences: A052172 A052173 A052174 * A052176 A052177 A052178

Keyword

nonn,tabf,easy,nice

Author

N. J. A. Sloane, Jan 26 2000

Status

approved