A052176 Triangle of numbers arising in enumeration of walks on square lattice.

1, 0, 2, 2, 0, 4, 0, 10, 0, 8, 10, 0, 34, 0, 16, 0, 70, 0, 98, 0, 32, 70, 0, 308, 0, 258, 0, 64, 0, 588, 0, 1092, 0, 642, 0, 128, 588, 0, 3024, 0, 3414, 0, 1538, 0, 256, 0, 5544, 0, 12276, 0, 9834, 0, 3586, 0, 512, 5544, 0, 31680, 0, 43230, 0, 26752, 0, 8194, 0

Offset

0,3

Links

Table of n, a(n) for n=0..64.

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

Example

1; 0,2; 2,0,4; 0,10,0,8; 10,0,34,0,16; 0,70,0,98,0,32; ...

Crossrefs

Essentially same as A052175.

Sequence in context: A131381 A295215 A112080 * A138092 A138090 A138093

Adjacent sequences: A052173 A052174 A052175 * A052177 A052178 A052179

Keyword

nonn,tabl,easy,nice

Author

N. J. A. Sloane, Jan 26 2000

Status

approved