Number of cycles in the n-dipyramidal graph.

Terms

a(0) =1a(1) =6a(2) =22a(3) =63a(4) =151a(5) =316a(6) =596a(7) =1037a(8) =1693a(9) =2626a(10) =3906a(11) =5611a(12) =7827a(13) =10648a(14) =14176a(15) =18521a(16) =23801a(17) =30142a(18) =37678a(19) =46551a(20) =56911a(21) =68916a(22) =82732a(23) =98533a(24) =116501a(25) =136826a(26) =159706a(27) =185347a(28) =213963a(29) =245776