A259908 Triangle read by rows: Hammersley's numbers c_{j,k} arising from a formula for A085707(n,k).

1, 3, 5, 17, 70, 61, 155, 1143, 2317, 1385, 2073, 23716, 82286, 110556, 50521, 38227, 623753, 3243270, 7258090, 7293671, 2702765, 929569, 20454498, 147624355, 484343420, 796220487, 639139202, 199360981

Offset

1,2

Links

Table of n, a(n) for n=1..28.

J. M. Hammersley, An undergraduate exercise in manipulation, Math. Scientist, 14 (1989), 1-23. See Eq. (52) and Table 2.

J. M. Hammersley, An undergraduate exercise in manipulation, Math. Scientist, 14 (1989), 1-23. (Annotated scanned copy)

Example

Triangle begins:
       1,
       3,        5,
      17,       70,        61,
     155,     1143,      2317,      1385,
    2073,    23716,     82286,    110556,     50521,
   38227,   623753,   3243270,   7258090,   7293671,   2702765,
  929569, 20454498, 147624355, 484343420, 796220487, 639139202, 199360981,
  ...

Crossrefs

Cf. A085707.

Diagonals are A001469, A000364.

Sequence in context: A125957 A374150 A378559 * A137460 A319908 A356256

Adjacent sequences: A259905 A259906 A259907 * A259909 A259910 A259911

Keyword

nonn,tabl,more

Author

N. J. A. Sloane, Jul 07 2015

Extensions

Missing row 5 added by Michel Marcus, Feb 07 2023

Status

approved