1,3

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

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).

Sequence in context: A077212 A076836 A117403 this_sequence A065845 A137273 A135967

Adjacent sequences: A002874 A002875 A002876 this_sequence A002878 A002879 A002880

nonn,hard,nice

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