A001625 Related to Latin rectangles.

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

Offset: 2

Author

N. J. A. Sloane

Keywords

• nonn

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

• 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

Extensions

More terms from Sean A. Irvine, Sep 25 2015