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 A081302 Subdiagonal of square array A081297. 6
 1, 1, 21, 61, 1891, 9633, 404713, 2997541, 159902271, 1564345201, 101406750589, 1236882490845, 94479649710811, 1382731226210881, 121677107761110993, 2079381120597925237, 207197254527662127511, 4051708966720224576081 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 FORMULA a(n) = ((n+3)^(n+1)-(-(n+2))^(n+1))/(2*n+5). MATHEMATICA Table[((n + 3)^(n + 1) - (-(n + 2))^(n + 1)) / (2 n + 5), {n, 0, 20}] (* Vincenzo Librandi, Aug 08 2013 *) PROG (MAGMA) [((n+3)^(n+1)-(-(n+2))^(n+1))/(2*n+5): n in [0..20]]; // Vincenzo Librandi, Aug 08 2013 CROSSREFS Cf. A081298, A081299, A081300, A081301. Sequence in context: A124714 A126375 A146468 * A058100 A219856 A195106 Adjacent sequences:  A081299 A081300 A081301 * A081303 A081304 A081305 KEYWORD easy,nonn AUTHOR Paul Barry, Mar 17 2003 STATUS approved

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Last modified June 26 04:11 EDT 2019. Contains 324369 sequences. (Running on oeis4.)