A001625 Related to Latin rectangles. (Formerly M1304 N0500)

2, 4, 60, 1276, 41888, 1916064, 116522048, 9069595840, 878460379392, 103547791177216, 14588580791234048, 2420219602973093376, 466877775127725240320, 103607067936116866084864, 26204424894484840874483712

Offset

2,1

References

S. M. Kerawala, The enumeration of the Latin rectangle of depth three by means of a difference equation, Bull. Calcutta Math. Soc., 33 (1941), 119-127.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=2..16.

S. M. Kerawala, The enumeration of the Latin rectangle of depth three by means of a difference equation, Bull. Calcutta Math. Soc., 33 (1941), 119-127. [Annotated scanned copy]

Index entries for sequences related to Latin squares and rectangles

Formula

a(2) = 2, a(n) = A001626(n) + 2 * A001627(n-1) + 2 * (n-1) * A001624(n-1). - Sean A. Irvine, Sep 25 2015

Crossrefs

Sequence in context: A009513 A242737 A018348 * A216758 A018352 A121059

Adjacent sequences: A001622 A001623 A001624 * A001626 A001627 A001628

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Sep 25 2015

Status

approved