Search: id:A028993
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%I A028993
%S A028993 1,27,85,175,297,451,637,855,1105,1387,1701,2047,2425,2835,3277,
%T A028993 3751,4257,4795,5365,5967,6601,7267,7965,8695,9457,10251,11077,
%U A028993 11935,12825,13747,14701,15687,16705,17755,18837,19951,21097,22275
%N A028993 Odd 10-gonal (or decagonal) numbers.
%H A028993 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               DecagonalNumber.html">Source</a>
%F A028993 (2n+1)(8n+1) [ N. J. A. Sloane (njas(AT)research.att.com) ].
%Y A028993 Sequence in context: A043962 A035074 A036925 this_sequence A007266 A098320 
               A034990
%Y A028993 Adjacent sequences: A028990 A028991 A028992 this_sequence A028994 A028995 
               A028996
%K A028993 nonn
%O A028993 0,2
%A A028993 Patrick De Geest (pdg(AT)worldofnumbers.com)

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