A002842 Number of strongly asymmetric sequences of length n. (Formerly M3446 N1400)

4, 12, 36, 96, 264, 648, 1584, 3576, 7872, 15360, 29184, 51120, 90384, 158448, 286296, 509808, 904296, 1556304, 2638368, 4273512, 6783888, 10308576, 15419640, 22305840, 32204568, 45812088, 65912784, 94069080

Offset

1,1

References

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

Sean A. Irvine, Table of n, a(n) for n = 1..35

F. Fiala, Strongly asymmetric sequences generated by four elements, Math. Comp., 25 (1971), 155-162.

Crossrefs

Sequence in context: A320967 A261584 A347990 * A051041 A192626 A294782

Adjacent sequences: A002839 A002840 A002841 * A002843 A002844 A002845

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Nov 09 2014

Status

approved