23905

Appears in sequences

• a(n) = dot_product(1,2,...,n)*(3,4,...,n,1,2).at n=39A026037
• Tenth column (k=9) of septinomial array A063265.at n=7A063418
• Number of permutations of length n which avoid the patterns 1432, 2134, 2314.at n=9A116797
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, -1, 1), (1, 1, 0)}.at n=9A149112
• Triangle of numbers C^(6)(n,k) of combinations with repetitions from n different elements over k for each of them not more than 6 appearances allowed.at n=54A213745
• Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 6 or 7 king-move adjacent elements, with upper left element zero.at n=13A305036
• Number of compositions of n into exactly n nonnegative parts <= six.at n=9A318114
• a(n) = 6*binomial(n,4) + 6*binomial(n,3) + 4*binomial(n,2) + 2*n + 1.at n=18A385689