49400

Appears in sequences

• a(n) = n*(n + 1)*(3*n + 1).at n=25A027903
• Number of partitions of n into parts not of the form 25k, 25k+10 or 25k-10. Also number of partitions with at most 9 parts of size 1 and differences between parts at distance 11 are greater than 1.at n=42A036009
• Number of polyominoes with n cells, symmetric about diagonal 2.at n=39A056878
• Row sums of triangle A134480.at n=38A134481
• 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, 0), (-1, 1, 0), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.at n=8A150768
• Minimal covering numbers.at n=31A160559
• T(n,k)=Number of nXk binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order.at n=38A181266
• Number of 3 X n binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order.at n=6A181271
• a(n) = A016755(n) - A001845(n).at n=19A188050
• Smallest number k such that k*(2^(2*A000043(n))-1)+1 is prime.at n=30A268175
• Expansion of ((1 + 2 * Sum_{k>=1} q^(k^2))^16 - 1) / 32.at n=6A302855
• Number of solutions to x^2 + y^2 + z^2 + w^2 <= n^2, where x, y, z, w are positive odd integers.at n=40A349611
• Expansion of g.f. A(x) satisfying A(x) = x*(1 + A(x))/(1 - x*(x + A(x))/(1 - x*(x^2 + A(x))/(1 - x*(x^3 + A(x))/(1 - ...)))), a continued fraction.at n=11A369530