51948

Appears in sequences

• a(n) = (7*n+1)*(7*n+2)*(7*n+4).at n=5A001547
• Smallest k such that k and k+n have the same prime signature that is different from all previous terms.at n=26A085876
• Number of tau-isomorphism classes of spherical bitrades with |T0| = n.at n=13A169955
• a(n) is the smallest even k >= 2 such that the first n multiples of k have the same sum of digits, but (n + 1)*k has a different one. a(n) = 0 if no such k exists.at n=39A237994
• Numbers n for which each of the digits 0-9 appears exactly once as first digit in the orbit of n under iterations of n -> (first digit of n)*(n with first digit removed) until a single digit is reached; no leading zeros allowed.at n=1A257299
• a(n) = n*(n+1)*(n+3).at n=36A317637
• Expansion of g.f. A(x) satisfying A(x)^2 = A( x^2/(1-2*x)^4 )/(1-2*x).at n=9A375444