31255

Appears in sequences

• 4-dimensional figurate numbers: a(n) = (5*n-1)*binomial(n+2,3)/4.at n=19A002418
• [ (3rd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+2 positive integers congruent to 1 mod 4}.at n=13A024386
• Terms of A050530 with four prime divisors.at n=19A053340
• Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k).at n=21A096927
• Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 3.at n=34A202843
• a(n) = floor((n + 1/2)^3).at n=31A219085
• a(n) = n*p(n)-spt(n) (= n*A000041(n) - A092269(n)).at n=23A220907
• a(n) = binomial(floor(n/2),4) + (ceiling(n/2)-3)*binomial(floor(n/2),3).at n=43A234277
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 315", based on the 5-celled von Neumann neighborhood.at n=28A281045
• Expansion of x*(1 + 3*x + x^2)/((1 - x)^5*(1 + x)^4).at n=37A287143
• Terms of A349937 that are not divisible by 3: numbers k > 1 not divisible by 2 or 3 such that A309906(k-1) < A309906(k) > A309906(k+1).at n=16A349941