51255

Appears in sequences

• Expansion of 1/((1-x)^3 (1-x^2)^2 (1-x^3) (1-x^4)).at n=28A002626
• Centered tetrahedral numbers.at n=42A005894
• C(2*n+4,4)-C(2*n,4).at n=21A085474
• Repeated terms in A087657 (a(n) = |prime(n)-a(n-1)| + |prime(n)-a(n-2)| + |prime(n)-a(n-3)| ).at n=9A087658
• Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+9.at n=6A116348
• Sum of the squares of the quadratic nonresidues of prime(n).at n=18A125617
• Number of 3-generalized Motzkin paths of length n with no level steps H=(3,0) at even level.at n=21A257516
• Odd composites for which gcd(A325977(n), A325978(n)) is equal to abs(A325977(n)).at n=12A325981