1,2

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

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

Robillard, Pierre; On the weighted finite linear spaces. Bull. Soc. Math. Belg. 22 (1970), 227-241.

Cf. A002877.

Sequence in context: A034341 A034342 A034343 this_sequence A095236 A018536 A162428

Adjacent sequences: A002873 A002874 A002875 this_sequence A002877 A002878 A002879

nonn,nice

N. J. A. Sloane (njas(AT)research.att.com).