17986

Appears in sequences

• House numbers (version 2): a(n) = (n+1)^3 + (n+1)*Sum_{i=0..n} i.at n=22A050509
• The n-th n-gonal number: a(n) = n*(n^2 - 3*n + 4)/2.at n=34A060354
• Number of ordered 5-multiantichains on an n-set.at n=4A092883
• Indices of primes occurring in A030284.at n=33A107365
• a(n) equals the (n*(n+1)/2)-th partial sum of the self-convolution cube of A010054, which has the g.f.: Sum_{k>=0} x^(k*(k+1)/2).at n=32A109414
• Number of base 32 n-digit numbers with adjacent digits differing by two or less.at n=5A126419
• Positions of zeros in A165597.at n=26A165598
• Expansion of -2*x^2*(-3-2*x+x^2-x^3-2*x^4+x^5) / ( (1+x)^2*(x-1)^4 ).at n=33A178465
• Number of partitions of n plus number of divisors of n.at n=35A195364
• Expansion of (1-x)^2*(1-3*x)/((1-3*x+x^2)*(1-5*x+5*x^2)).at n=8A217778
• Number of arrays of the median of three adjacent elements of some length n+2 0..5 array.at n=5A228737
• T(n,k) = number of arrays of the median of three adjacent elements of some length n+2 0..k array.at n=50A228740
• Number of arrays of the median of three adjacent elements of some length 8 0..n array.at n=4A228743
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 206", based on the 5-celled von Neumann neighborhood.at n=38A270735
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 934", based on the 5-celled von Neumann neighborhood.at n=37A273794
• 34-gonal numbers: a(n) = n*(32*n-30)/2.at n=34A282854
• a(n) = 34*n^2.at n=23A303302
• Total number of parts coprime to n in the partitions of n into 10 parts.at n=39A363328
• Radicands of pure cubic number fields of type BETA and subtype M0.at n=21A363699