74898

Appears in sequences

• Expansion of Product_{m>=1} (1 + m*q^m)^19.at n=5A022647
• a(n) = floor(2^(n+2)/7).at n=16A033138
• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,2.at n=8A037497
• Numbers that are repdigits in base 8.at n=37A048333
• Expansion of 1/(1 - x - x^2 - 2*x^3).at n=17A077947
• Number of increasing runs of even length in all permutations of [n].at n=8A097593
• Periodicity of the reciprocal of the Mersenne numbers (A001348).at n=7A100491
• Numbers whose base-8 or octal representation is 22222222.......2.at n=6A125835
• a(0) = 0; for n>0, a(n) = period length of the decimal expansion of the number Sum_{i>=1} 2^(-n*i). Also period length of the fractions 1/b(n), where b(n) = 2*b(n-1) + 1, with b(1)=1.at n=18A136273
• a(n) + a(n+1) + a(n+2) = 2^n.at n=18A152732
• A023001 interleaved with 2*A023001 and 4*A023001.at n=19A155803
• Moore lower bound on the order of a (9,g)-cage.at n=9A198309
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative even determinant.at n=21A210371
• Sum of the largest parts in the partitions of 3n into 3 parts.at n=37A236370
• Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k valleys of width 1 (i.e., DHU configurations, where U=(0,1), H=(1,0), D=(0,-1)), (n>=2, k>=0).at n=28A273721