18831

Appears in sequences

• Weighted count of partitions with odd parts.at n=47A005896
• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 5).at n=49A035563
• 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, 0, 0), (-1, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, 0)}.at n=9A148938
• Arises in classification of base sequences.at n=29A173061
• Number of 7-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=10A187512
• Number of partitions of n having no perfect cube parts (n>=0).at n=49A264393
• Isolated deficient numbers that are divisible by 3.at n=28A273255
• Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = Sum_{j=1..n} j^k * floor(n/j).at n=58A319649
• Sum of the second largest parts of the partitions of n into 9 squarefree parts.at n=49A326531
• a(n) = Sum_{i=1..n} phi(i)*phi(i+1), where phi(n) = A000010(n) is Euler's totient function.at n=54A330319
• Number of partitions of n containing a prime number of primes and an arbitrary number of nonprimes.at n=40A344677