117993

Appears in sequences

• Cyclotomic polynomials at x=7.at n=9A019325
• Cyclotomic polynomials at x = -7.at n=18A020506
• Base-7 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=6A033143
• Sums of 3 distinct powers of 7.at n=23A038482
• a(n) = sigma_3(2*n+1).at n=24A045823
• a(n) = n^6 + n^3 + 1.at n=7A060883
• Numbers of the form (7^{mr}-1)/(7^r-1) for positive integers m, r.at n=12A076286
• a(n) = sigma_3(3n+1).at n=16A092342
• Smallest positive multiple of n whose base-7 representation contains only 0's and 1's.at n=36A244958
• a(n) = 1 + sigma(n)^3 + sigma(n)^6.at n=3A259369
• a(n) = J_9(n)/J_3(n), where J_k is the k-th Jordan totient function.at n=6A381713