24201

Appears in sequences

• 9*w(n) where : w(1)=w(2)=w(3)=1 w(n)=(w(n-1)*w(n-2)+(w(n-1)+w(n-2))/3) / w(n-3).at n=13A072563
• a(n) = 3*a(n-1) - 3*a(n-3) + a(n-4) for n > 3, with a(0) = 1, a(1) = 3, a(2) = 9, a(3) = 27.at n=10A084707
• a(n) = floor(7^n/5^n).at n=30A094984
• Middle term of a triple of consecutive numbers which are sums of two squares.at n=10A096129
• Table of number of domino tilings of generalized Aztec pillows of type (1, ..., 1, 3, 1, ..., 1)_n.at n=33A112830
• a(n) = 50*n^2 + 1.at n=21A157916
• Numbers n such that the decimal number concat(7,n) is a square.at n=31A273362
• Numbers n such that the sum of the divisors of n is of the form m^2+1.at n=6A289290
• Numbers k in A228058 such that also A001065(k) is in A228058.at n=30A325380
• (A331763(n) - A331755(n+1))/2.at n=32A335687
• The leftmost digit L of a(n) jumps over L+1 digits to the left and is duplicated there; the rightmost digit R of a(n) jumps over R digits to the right and is duplicated there. Lexicographically earliest sequence of distinct positive integers with this property and a(1) = 11.at n=60A336036
• Fourier coefficients of the modular form (1/t_{6a}) * (1-12*sqrt(-3)/t_{6a})^(7/6) * F_{6a}^10.at n=4A341565
• Number of integer partitions of n of length > 2 whose second differences have median 0.at n=39A360682
• Number of fixed triangular polyominoes with 2n cells of the regular tiling with Schläfli symbol {3,6} that have a common axis of symmetry coincident with cell edges.at n=11A364485