22048

Appears in sequences

• a(n) = floor(tau*a(n-1)) + floor(tau*a(n-2)) with a(0)=1 and a(1)=3.at n=12A005913
• Number of partitions of n into parts not of the form 19k, 19k+6 or 19k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=39A035975
• Numbers n such that if p=prime(n), then p, p+6, p+12, p+18 are consecutive primes with p=6*k+5 for some k, where prime(n) denotes n-th prime.at n=36A090835
• Numbers n such that 4*10^n + 3*R_n - 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=25A102988
• Triangle arising in connection with deformations of type D Kleinian singularities.at n=32A108959
• a(n) = floor(n*(n^3-n-3)/(2*(n-1))).at n=33A117561
• a(n) = (prime(n))^2 - (nonprime(n))^2.at n=36A161757
• Triangle of coefficients of polynomials u(n,x) jointly generated with A210601; see the Formula section.at n=51A210600
• Number of unlabeled simple graphs with n nodes of 2 colors whose components are path graphs.at n=11A217194
• Triangular array read by rows. T(n,k) is the number of square lattice walks that start and end at the origin after 2n steps having k primitive loops; n>=1, 1<=k<=n.at n=11A227997
• Number of partitions of n whose median is not a part.at n=46A238479
• Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=2A250966
• Number of (n+1)X(3+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=2A250968
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=12A250973
• Numbers n representable as x*y + x + y, where x >= y > 1, such that all x's and y's in all representation(s) of n are perfect squares.at n=31A258366
• Number of n X 3 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) (0,-1) or (-1,0) and new values introduced in order 0..2.at n=7A274798
• T(n,k)=Number of nXk 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) (0,-1) or (-1,0) and new values introduced in order 0..2.at n=47A274803
• T(n,k)=Number of nXk 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) (0,-1) or (-1,0) and new values introduced in order 0..2.at n=52A274803
• Starts of runs of 3 consecutive factorial base Niven numbers (A118363).at n=13A328206
• Numbers k such that each of k, k+1, k+2, and k+4 is a sum of two squares.at n=31A328224