21465

Appears in sequences

• a(n) = 10*a(n-1)+n^3, a(0)=0.at n=5A055528
• Convolution of L(n+1) := A000204(n+1) (Lucas), n>=0, with L(n+6), n>=0.at n=9A067984
• Number of partitions of the n-th decimal palindrome into distinct decimal palindromes.at n=44A091585
• Coefficients of the derivatives of the Eulerian polynomials (with indexing as in A173018).at n=25A142706
• a(n) = (2*n^3 + 5*n^2 - 3*n)/2.at n=26A162256
• Triangle read by rows, e.g.f. exp(x*(z+3/2))/((exp(3*x/2)+2*cos(sqrt(3)*x/2))/3).at n=57A215062
• Numbers k such that k!4 + 2^4 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).at n=34A291344
• Indices of primes followed by a gap (distance to next larger prime) of 44.at n=20A320720
• Triangle read by rows. The Hadamard product of A173018 and A349203.at n=41A363154
• Number of integer partitions of n such that for some part k the multiplicity of k exceeds k.at n=38A387578