102943

Appears in sequences

• a(n) = (1 - (-7)^n)/8.at n=6A014989
• Triangle of q-binomial coefficients for q=-7.at n=29A015117
• Triangle of q-binomial coefficients for q=-7.at n=34A015117
• Gaussian binomial coefficient [ n,6 ] for q = -7.at n=1A015330
• a(n) = 6*a(n-1) + 7*a(n-2), a(0) = 0, a(1) = 1.at n=7A015552
• Cyclotomic polynomials at x=7.at n=14A019325
• Strong pseudoprimes to base 7.at n=21A020233
• Strong pseudoprimes to base 49.at n=33A020275
• Cyclotomic polynomials at x = -7.at n=7A020506
• Expansion of g.f. 1/((1-x)*(1-6*x)*(1-8*x)*(1-12*x)).at n=4A024114
• a(n) = (n^n + 1)/ (n^(2^a) + 1), where 2^a is the highest power of 2 dividing n.at n=6A056009
• a(n) = (p^p + 1)/(p + 1), where p = prime(n).at n=2A056852
• a(n) = n^6 - n^5 + n^4 - n^3 + n^2 - n + 1.at n=7A060888
• Zsigmondy numbers for a = 7, b = 1: Zs(n, 7, 1) is the greatest divisor of 7^n - 1^n (A024075) that is relatively prime to 7^m - 1^m for all positive integers m < n.at n=13A064083
• a(n) = floor(2^n*Pi).at n=16A068425
• a(n) = (n^n-(-1)^n)/(n+1).at n=7A081216
• Duplicate of A068425.at n=15A088970
• Area of annuli of consecutive integer thickness.at n=31A114378
• a(n) = ((2^n - 1)^(2^n - 1) + 1) / 2^n.at n=2A122000
• Sierpinski quotient ((2n-1)^(2n-1) + 1)/(2n) = A014566(2n-1)/(2n).at n=3A124899