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 A001625 Related to Latin rectangles. (Formerly M1304 N0500) 1
 2, 4, 60, 1276, 41888, 1916064, 116522048, 9069595840, 878460379392, 103547791177216, 14588580791234048, 2420219602973093376, 466877775127725240320, 103607067936116866084864, 26204424894484840874483712 (list; graph; refs; listen; history; text; internal format)
 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 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] 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 EXTENSIONS More terms from Sean A. Irvine, Sep 25 2015 STATUS approved

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Last modified December 10 17:20 EST 2018. Contains 318049 sequences. (Running on oeis4.)