315315

Appears in sequences

• Generalized Stirling numbers, [n+3,n]_2.at n=13A001702
• a(n) = 7*(n+1)*binomial(n+2,7)/2.at n=8A027780
• a(n) = 9*(n+1)*binomial(n+2,9)/2.at n=6A027782
• E.g.f.: (1 + 15*x + (45/2)*x^2 + (5/2)*x^3)/(1 - 2*x)^(13/2).at n=4A038121
• a(n) = n*(n+1)*(n+2)*(n+3)*(3*n+2)/120.at n=25A051836
• Denominators of coefficients of expansion of arctan(x)^2 = x^2-2/3*x^4+23/45*x^6-44/105*x^8+563/1575*x^10-3254/10395*x^12+ ...at n=7A071968
• Coefficients of polynomial in x multiplying sinh(x) in the modified spherical Bessel function of the first kind i_n(x).at n=54A094674
• Triangle of Bessel numbers read by rows: T(n,k) is the number of k-matchings of the complete graph K(n).at n=60A100861
• Triangle read by rows: row n gives number of matchings of size 0<=k<=n (edges) in the complete graph on 2*n >= 2 vertices.at n=31A119743
• Triangle of the denominators of the coefficients [x^k] P(n,x) defined in A141904.at n=29A142048
• Numbers with exactly 5 distinct odd prime divisors {3,5,7,11,13}.at n=8A147578
• Exponential Riordan array [1/sqrt(1-2x), x/(1-2x)].at n=31A176230
• Coefficient array of orthogonal polynomials whose moment sequence is the double factorial numbers A001147.at n=31A176231
• Numbers k such that the sum of the distinct prime divisors of k equals three times the largest prime divisor of k.at n=26A200090
• Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=10A207070
• Irregular triangle read by rows in which the n-th row lists multinomials (A036040) for partitions of 2n which have only even parts in Abramowitz-Stegun ordering.at n=40A257490
• Square array read by antidiagonals arising in the enumeration of corners.at n=30A259101
• Square array read by antidiagonals arising in the enumeration of corners.at n=33A259101
• Least positive integer k with exactly n odd divisors greater than sqrt(2*k).at n=31A281008
• Number of relaxed compacted binary trees of right height at most one with empty initial and final sequence on level 0.at n=8A288950