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A257133
a(n) = cpg(3, n) * cpg(4, n) * ... * cpg(n, n) where cpg(m, n) is the n-th m-th-order centered polygonal number.
2
1, 1, 1, 10, 475, 64821, 19406296, 10838525440, 10144997182125, 14751443961879625, 31491407608395366016, 94486384518726630882816, 384839939170279634083854175, 2068398906358519479054060953125, 14329327322496735822187340743680000
OFFSET
0,4
EXAMPLE
a(4) = cpg(3, 4) * cpg(4, 4) = 19 * 25 = 475.
PROG
(PARI) cpg(m, n) = m*n*(n-1)/2+1
vector(50, n, n--; prod(m=3, n, cpg(m, n)))
CROSSREFS
Sequence in context: A288548 A289030 A323205 * A159533 A274760 A173157
KEYWORD
nonn
AUTHOR
Colin Barker, Apr 16 2015
STATUS
approved