83810

Appears in sequences

• Convolution of A000203 with itself.at n=57A000385
• a(n) = n*(2*n^2 + 1)*(n^2 + 1)/6.at n=11A052459
• Numbers k such that core(k) = ceiling(sqrt(k)) where core(k) is the squarefree part of k (the smallest integer such that k*core(k) is a square).at n=16A069187
• a(n) = n^2*(n^2+1).at n=17A071253
• Sum of two powers of 17.at n=12A073213
• Number of partitions of n such that multiplicities of parts are divisors of n.at n=47A100932
• 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), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.at n=9A149477
• Number of tatami tilings of a 4 X n grid (with monomers allowed).at n=15A192090
• a(0)=0, a(1)=1, a(2n)=17*a(n), a(2n+1)=a(2n)+1.at n=20A197351
• Numbers k such that core(k) is equal to the sum of the proper square divisors of k, where core(k) = A007913(k).at n=10A225882
• Numbers of the form p^2 * (p^2 + 1) where p is in A225856.at n=5A225892
• Number of totally aperiodic integer partitions of n.at n=44A319811
• Primitive numbers that are the sum of the squares of two of their distinct divisors.at n=26A338485
• a(n) is the number of large or small squares that are used to tile primitive squares of type 1 whose length of side is A344333(n).at n=35A344334
• a(n) = n^2*sigma_2(n).at n=17A386745