29526

Appears in sequences

• Numbers having four 4's in base 9.at n=21A043472
• Number of vertices in Sierpiński triangle of order n.at n=9A067771
• a(1)=1; then successively add 1, divide by 2, add 2 and then total up the last 4 terms.at n=39A112027
• a(0) = 2, a(n) = 3*a(n-1) - 3.at n=10A115098
• Denominator of sum of reciprocals of first n 5-simplex numbers A000389.at n=33A118432
• a(n) = 6 * A015518(n).at n=9A120471
• a(n) = 3*A132357(n).at n=8A135264
• a(n) = n*(n^9+1)/2.at n=3A168118
• Triangle of coefficients of polynomials v(n,x) jointly generated with A210803; see the Formula section.at n=46A210804
• The number of meandering curves of order n, with only one extremity covered by its arcs.at n=11A217310
• Number of foldings of n labeled stamps in which leaf 1 is inwards and leaf n outwards (or leaf 1 outwards and leaf n inwards).at n=11A223093
• Numbers of the form (3^j + 9^k)/2, for j and k >= 0.at n=41A226793
• Least positive integer k such that k*n+1 = prime(p) and k^2*n+1 = prime(q) for some pair of primes p and q.at n=25A261437
• Partial sums of A140091.at n=37A267370
• Least k such that phi(k) is an n-th power when k is the product of n distinct primes.at n=4A281069
• Irregular triangle read by rows: T(n,k) is the number of unordered pairs of nodes at distance k in the n-Apollonian network.at n=29A289722