22220

Appears in sequences

• Coordination sequence for hexagonal close-packing.at n=46A007899
• a(0) = 1, a(n) = 42*n^2 + 2 for n>0.at n=23A010023
• Numbers whose maximal base-10 run length is 4.at n=29A033285
• Numbers having four 2's in base 10.at n=8A043500
• A064637 converted to factorial base.at n=24A064477
• Trace sequence of a path graph plus loop.at n=17A096975
• Number of triangles in an n X n grid of squares with diagonals.at n=19A100583
• Expansion of q^(-1/2)(eta(q^3)/eta(q))^6 in powers of q.at n=9A121596
• Numbers k such that k^3 divides 3^(k^2) - 1.at n=42A129211
• Zero followed by partial sums of A059100, starting at n=1.at n=40A145068
• Coefficients in the expansion of C^7/B^8, in Watson's notation of page 106.at n=7A160521
• Numbers consisting of either 2's and 0's or 5's and 0's.at n=38A168541
• Numbers whose decimal expansion contains only 0's and 2's.at n=30A169965
• a(n) has generating function 1/((1-x)^k*(1-x^2)^(k*(k-1)/2)) for k=5.at n=9A181477
• 1/4 the number of arrangements of n+1 nonzero numbers x(i) in -8..8 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.at n=3A189950
• 1/4 the number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.at n=7A189954
• a(n,k) equals the number of semistandard Young tableaux with shape of a partition of n and maximal element <= k.at n=40A191714
• Numbers of rank 11 in the poset of lunar numbers.at n=37A191753
• Number of semistandard Young tableaux over all partitions of 9 with maximal element <= n.at n=5A210431
• Dates after Jan 01 00 in chronological order which are palindromic when they are written according to the format MMDDYY (American standard, short). Leading zeros of the terms are suppressed.at n=7A210895