38988

Appears in sequences

• Number of signed permutations in B_n which correspond to smooth Schubert varieties. These permutations avoid the following patterns: (-2 -1) (1 2 -3) (1 -2 -3) (-1 2 -3) (2 -1 -3) (-2 1 -3) (3 -2 1) (2 -4 3 1) (-2 -4 3 1) (3412) (3 4 -1 2) (-3 4 1 2) (4 1 3 -2) (4 -1 3 -2) (4 2 3 1) (4 2 3 -1) (-4 2 3 1).at n=8A061539
• Smallest multiple of n^2 beginning with n.at n=37A078210
• a(n) = (4*n^3 + 11*n^2 + 9*n + 2)/2.at n=26A135712
• G.f. -x*(x-1)*(1+x)/(1-x-12*x^2-x^3+x^4).at n=9A171069
• Numbers of the form p^3*q^2*r^2 where p, q, and r are distinct primes.at n=20A179695
• Number of 2-step self-avoiding walks on an n X n X n cube summed over all starting positions.at n=18A187163
• a(n) = 27*n^2.at n=38A244634
• Second smallest multiple of n whose digits sum to n.at n=35A245065
• Integers whose arithmetic derivative is equal to their Dedekind function.at n=11A301939
• Numbers such that the list of exponents of their factorization is a palindromic list of primes.at n=9A322525
• Numbers that are a divisor of the sum of their divisors to their own powers.at n=13A336892
• Numbers k for which A344998(k) = A344999(k).at n=15A345003
• Positions k where A348733(k) is not multiplicative.at n=43A348740
• Terms of A319928 that are congruent to 4 modulo 8: Numbers k == 4 (mod 8) such that there is no other m such that (Z/mZ)* is isomorphic to (Z/kZ)*, where (Z/kZ)* is the multiplicative group of integers modulo k.at n=32A372755
• Achilles numbers sandwiched between two semiprimes.at n=21A380937