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A176417 A symmetrical triangle sequence;q=2;c(n,q)=Product[1 - q^i, {i, 1, n}];t(n,m,q)=1 - n! + n!*c(n, q)/(c[m, q)*c(n - m, q))/Binomial[n, m] 0
1, 1, 1, 1, 2, 1, 1, 9, 9, 1, 1, 67, 117, 67, 1, 1, 625, 1741, 1741, 625, 1, 1, 6841, 30529, 49501, 30529, 6841, 1, 1, 86401, 635041, 1695745, 1695745, 635041, 86401, 1, 1, 1244881, 15504481, 69911281, 115612993, 69911281, 15504481, 1244881, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,5
COMMENTS
Row sums are:
{1, 2, 4, 20, 253, 4734, 124243, 4834376, 288934281, 26786718730,
3842906762891,...}.
LINKS
FORMULA
q=2;
c(n,q)=Product[1 - q^i, {i, 1, n}];
t(n,m,q)=1 - n! + n!*c(n, q)/(c[m, q)*c(n - m, q))/Binomial[n, m]
EXAMPLE
{1},
{1, 1},
{1, 2, 1},
{1, 9, 9, 1},
{1, 67, 117, 67, 1},
{1, 625, 1741, 1741, 625, 1},
{1, 6841, 30529, 49501, 30529, 6841, 1},
{1, 86401, 635041, 1695745, 1695745, 635041, 86401, 1},
{1, 1244881, 15504481, 69911281, 115612993, 69911281, 15504481, 1244881, 1},
{1, 20240641, 437461921, 3403948321, 9531708481, 9531708481, 3403948321, 437461921, 20240641, 1},
{1, 367597441, 14047971841, 191951272801, 928692466561, 1572788145601, 928692466561, 191951272801, 14047971841, 367597441, 1}
MATHEMATICA
c[n_, q_] = Product[1 - q^i, {i, 1, n}];
t[n_, m_, q_] = 1 - n! + n!*c[n, q]/(c[m, q]*c[n - m, q])/Binomial[n, m];
Table[Flatten[Table[Table[t[n, m, q], {m, 0, n}], {n, 0, 10}]], {q, 2, 12}]
CROSSREFS
Sequence in context: A141601 A108558 A128434 * A119731 A368928 A283321
KEYWORD
nonn,tabl,uned
AUTHOR
Roger L. Bagula, Apr 17 2010
STATUS
approved

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Last modified May 29 22:36 EDT 2024. Contains 372954 sequences. (Running on oeis4.)