%I A010974
%S A010974 1,22,253,2024,12650,65780,296010,1184040,4292145,14307150,
%T A010974 44352165,129024480,354817320,927983760,2319959400,5567902560,
%U A010974 12875774670,28781143380,62359143990,131282408400,269128937220
%N A010974 Binomial coefficient C(n,21).
%C A010974 Product of 21 consecutive numbers divided by 21!. - Artur Jasinski (grafix(AT)csl.pl), 
               Dec 02 2007
%C A010974 In this sequence there are no primes - Artur Jasinski (grafix(AT)csl.pl), 
               Dec 02 2007
%C A010974 With a different offset, number of n-permutations (n>=21) of 2 objects: 
               u,v, with repetition allowed, containing exactly (21) u's. [From 
               Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Aug 04 2008]
%H A010974 Milan Janjic, <a href="http://www.pmfbl.org/janjic/">Two Enumerative 
               Functions</a>
%F A010974 a(n)=n(n+1)(n+2)(n+3)(n+4)(n+5)(n+6)(n+7)(n+8)(n+9)(n+10)(n+11)(n+12)(n+13)(n+14)(n+15)(n+16)(n+17)(n+18)(n+1\
               9)(n+20)/21! - Artur Jasinski (grafix(AT)csl.pl), Dec 02 2007
%F A010974 Gf.: 1/(1-x)^22. [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Aug 04 2008]
%p A010974 (Maple) seq(binomial(n,21),n=21..41); [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Aug 04 2008]
%t A010974 Table[n(n+1)(n+2)(n+3)(n+4)(n+5)(n+6)(n+7)(n+8)(n+9)(n+10)(n+11)(n+12)(n+13)(n+14)(n+15)(n+16)(n+17)(n+18)(n+\
               19)(n+20)/21!,{n,1,100}] - Artur Jasinski (grafix(AT)csl.pl), Dec 
               02 2007
%Y A010974 Pascal's triangle A007318 [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Aug 04 2008]
%Y A010974 Sequence in context: A109251 A072076 A028571 this_sequence A022587 A143479 
               A004412
%Y A010974 Adjacent sequences: A010971 A010972 A010973 this_sequence A010975 A010976 
               A010977
%K A010974 nonn
%O A010974 21,2
%A A010974 N. J. A. Sloane (njas(AT)research.att.com).