50688

Appears in sequences

• Theta series of {D_9}^{+} packing.at n=41A008436
• Theta series of lattice D_3 tensor D_4 (dimension 12, det. 16384, min. norm 4).at n=7A033696
• Smallest natural number k such that periodic part of 1/k is n, or 0 if no such k exists.at n=35A037207
• Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 1 skipped prime.at n=25A050768
• Sixth unsigned column of Lanczos triangle A053125 (decreasing powers).at n=3A054324
• Scaled Chebyshev U-polynomials evaluated at i*sqrt(2). Generalized Fibonacci sequence.at n=5A057091
• 12-almost primes (generalization of semiprimes).at n=26A069273
• Triangle T(n,k) (n >= 2, 2 <= k <= n-1 if n > 2) giving number of non-crossing trees with n nodes and k endpoints.at n=38A072247
• A transform of binomial(n,5).at n=7A082139
• a(n) = 8*a(n-1) - 8*a(n-2), a(0)=1, a(1)=4.at n=6A084130
• Partial sums of n 3-spaced triangular numbers beginning with t(2), e.g., a(2) = t(2) + t(5) = 3 + 15 = 18.at n=31A085789
• Generalized Stirling2 array S_{4,4}(n,k).at n=8A090214
• Analog of A095236 when the phones are arranged in a circle.at n=10A095239
• An inverse Chebyshev transform of the Jacobsthal numbers.at n=13A100096
• Column 3 of the array in A107735.at n=11A107734
• Triangle T(n,k) with the coefficient of [x^k] of the polynomial (2*(x+1)^2)^n in row n, column k, 0<=k<=2n.at n=43A139548
• Triangle T(n,k) with the coefficient of [x^k] of the polynomial (2*(x+1)^2)^n in row n, column k, 0<=k<=2n.at n=41A139548
• Totally multiplicative sequence with a(p) = 2*(5p+1) = 10p+2 for prime p.at n=41A167337
• a(n) = 6*n^2*(2*n + 1).at n=16A190705
• Integers k such that for all i > k the largest prime factor of i(i+1)(i+2)(i+3)(i+4)(i+5)(i+6) exceeds the largest prime factor of k(k+1)(k+2)(k+3)(k+4)(k+5)(k+6).at n=20A193948