22748

Appears in sequences

• Expansion of 1/((1+x)*(1-x)^12).at n=7A001808
• Coordination sequence for alpha-Mn, Position Mn4.at n=39A009953
• Numbers that, when expressed in base 3 and then interpreted in base 10, yield a multiple of the original number.at n=34A032537
• Number of step shifted (decimated) sequence structures using exactly three different symbols.at n=11A056397
• Number of binary strings of length n with equal numbers of 00010 and 00101 substrings.at n=15A164212
• Expansion of (2/(3*sqrt(1-4*z)-1+4*z))*((1-sqrt(1-4*z))/(2*z))^k with k=4.at n=7A172061
• a(1) = 1; a(2*n) = prime(n)*a(n), a(2*n+1) = prime(n)*a(n) + a(n+1), where prime(n) is the n-th prime.at n=29A176716
• Number of generalized mountain numbers (see A134853) with n digits.at n=10A178912
• Length of binary representation of Fibonacci(2^n).at n=15A215422
• Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=5A234878
• Number of (n+1) X (6+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=3A234880
• T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=39A234882
• T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=41A234882
• a(n) = 2*n^3 + 3*n^2.at n=22A275709
• Number of nX2 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=9A280598
• a(n) = ((11-sqrt(11))^n + (11+sqrt(11))^n) / 2.at n=4A289415
• Numbers k such that (316*10^k - 1)/9 is prime.at n=19A290150
• Consider coefficients U(m,l,k) defined by the identity Sum_{k=1..l} Sum_{j=0..m} A302971(m,j)/A304042(m,j) * k^j * (T-k)^j = Sum_{k=0..m} (-1)^(m-k) * U(m,l,k) * T^k that holds for all positive integers l,m,T. This sequence gives 2-column table read by rows, where n-th row lists coefficients U(1,n,k) for k = 0, 1 and n >= 1.at n=42A320047
• Primorial base Niven numbers (A333426) with a record gap to the next primorial base Niven number.at n=15A347496