1334025

Appears in sequences

• a(1)=10; if n = Product p_i^e_i, n > 1, then a(n) = Product p_{i+1}^e_i * Product p_{i+3}^e_i.at n=35A045973
• Least number of the form x^2 + y^3 (x, y nonnegative) in exactly n ways.at n=6A060861
• a(n) = (4*n^2 - 1)^2.at n=17A069075
• a(n) = ( n*(n+2) )^2.at n=33A099761
• Numerators in the fractional coefficients that form the partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=12A110255
• Numerators in the coefficients that form the odd-indexed partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=6A110257
• Odd abundant numbers whose abundance is odd.at n=7A156942
• Denominator of 1/n^2-1/(n+2)^2.at n=33A171522
• a(n) = denominator of (Zeta(2, 3/4) - Zeta(2, n-1/4)), where Zeta is the Hurwitz Zeta function.at n=4A173954
• Numbers with prime factorization p^2*q^2*r^2*s^2 where p, q, r, and s are distinct primes.at n=18A190377
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.at n=32A208114
• Squares not divisible by 10 with digits d_1, d_2, ... d_k such that d_1^2 + ... + d_k^2 is a square.at n=36A254959
• Odd abundant numbers k for which sigma(k) == 3 (mod 4).at n=5A325311
• The squares of squarefree numbers (A062503), ordered lexicographically according to their prime factors. a(n) = Product_{k in I} prime(k+1)^2, where I are the indices of nonzero binary digits in n = Sum_{k in I} 2^k.at n=30A334110
• Exponential barely deficient numbers: exponential deficient numbers whose exponential abundancy is closer to 2 than that of any smaller exponential deficient number.at n=10A336253
• Primitive terms of A347936: terms of A347936 that are not multiples of other terms of A347936.at n=23A347939
• Odd noninfinitary abundant numbers: the odd terms of A348274.at n=3A348275
• Indices at which A358777 attains a new value.at n=24A359608
• a(n) = A038547(3^n), smallest number with 3^n odd divisors.at n=3A360435
• a(0) = 0, and for n > 0, a(n) is the square of the product of first n-1 odd primes.at n=5A369059