44287

Appears in sequences

• a(n) = (1 - (-3)^n)/4.at n=11A014983
• Gaussian binomial coefficient [ n,10 ] for q=-3.at n=1A015388
• a(n) = 2*a(n-1) + 3*a(n-2), with a(0)=0, a(1)=1.at n=11A015518
• Cyclotomic polynomials at x=3.at n=22A019321
• Strong pseudoprimes to base 3.at n=13A020229
• Strong pseudoprimes to base 9.at n=33A020235
• Strong pseudoprimes to base 27.at n=31A020253
• Strong pseudoprimes to base 68.at n=31A020294
• Cyclotomic polynomials at x=-3.at n=11A020502
• Gaps of 10 in sequence A038593 (lower terms).at n=19A038659
• Numbers having four 6's in base 9.at n=30A043480
• Base-3 Euler-Jacobi pseudoprimes.at n=22A048950
• Zsigmondy numbers for a = 3, b = 1: Zs(n, 3, 1) is the greatest divisor of 3^n - 1^n (A024023) that is relatively prime to 3^m - 1^m for all positive integers m < n.at n=21A064079
• Number of distinct paths of length 2n+1 along edges of a unit cube between two fixed adjacent vertices.at n=5A066443
• Numbers of the form (3^s+1)/(3^r+1) for s > 1, 1 <= r <= s-1.at n=7A079672
• Square array read by antidiagonals: T(n,k) = (k*(2*k+3)^n + 1)/(k+1).at n=41A083075
• a(n) = least semiprime with factors not previously used containing integers 2n and 2n+1 as substrings.at n=33A086887
• a(n) = (2 + (-1)^n + 3^n)/4.at n=11A122983
• Ceiling(3^n/n).at n=11A129787
• a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), starting with 1, 2, 6, 20.at n=10A132353