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A114059 a(n) = binomial(3+2*n, n) * binomial(8+2*n, 3+n). 1
56, 1050, 16632, 252252, 3775200, 56316546, 840639800, 12575971408, 188663555808, 2838687761000, 42836302222560, 648207031545000, 9834444563299200, 149569451148798450, 2279905857066915000, 34825702701626575200, 532997250488883180000, 8172044956118671828200 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = A062190(3+2*n, 3+n).
EXAMPLE
a(0) = C(3+2*0,0)*C(8+2*0,3+0) = C(3,0)*C(8,3) = 1*56 = 56.
a(10) = C(3+2*10,10)*C(8+2*10,3+10) = C(23,10)*C(28,13) = 1144066*37442160 = 42836302222560.
PROG
(PARI) a(n)={binomial(3+2*n, n) * binomial(8+2*n, 3+n)} \\ Andrew Howroyd, Jan 07 2020
CROSSREFS
Cf. A062190.
Sequence in context: A251432 A243206 A278675 * A221802 A219583 A341429
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Feb 02 2006
EXTENSIONS
Name edited and terms a(11) and beyond from Andrew Howroyd, Jan 07 2020
STATUS
approved

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Last modified July 21 18:17 EDT 2024. Contains 374475 sequences. (Running on oeis4.)