26235

Appears in sequences

• a(n) = 1^2 + 3^2 + 5^2 + 7^2 + ... + (2*n-1)^2 = n*(4*n^2 - 1)/3.at n=27A000447
• Binomial coefficient C(5n,n-8).at n=3A004350
• Odd tetrahedral numbers: a(n) = (4*n+1)*(4*n+2)*(4*n+3)/6.at n=13A015219
• Binomial coefficients C(n,52).at n=3A017716
• Binomial coefficients C(55,n).at n=3A017771
• a(n) = (prime(n)-3)*(prime(n)-5)*(prime(n)-7)/48.at n=28A030003
• a(n) = n*(n-1)*(n-2)*(n-3)*(n^2-3*n-2)/48.at n=12A093566
• a(n) = A130179(n)/81.at n=24A130085
• Tetrahedral numbers k*(k+1)*(k+2)/6 such that exactly one of k, k+1, and k+2 is prime.at n=31A144521
• Sequence related to Hankel transform of super-ballot numbers.at n=25A156126
• a(n) = 81*n^2 - 9.at n=17A157909
• Coefficients of powers of x^2 of polynomials, called h(2,n,x^2), appearing in a conjecture on alternating sums of fifth powers of odd-indexed Chebyshev S polynomials stated in A220671.at n=46A220672
• a(n) = binomial(3*n + 1,3).at n=17A228887
• From higher-order Bernoulli numbers: denominator of the D-number D2n(2n-1).at n=25A261272
• Expansion of Product_{n>=1} (1 - x^(3*n))/(1 - x^n)^3 in powers of x.at n=15A273845
• a(n) = (5*n + 3)*(5*n + 4)*(5*n + 5)/6.at n=10A300522