49980

Appears in sequences

• Fermat coefficients.at n=23A000970
• a(n) = floor(C(n,4)/5).at n=51A011795
• Numbers whose base-4 representation contains exactly four 0's and four 3's.at n=6A045085
• List of codewords in binary lexicode with Hamming distance 8 written as decimal numbers.at n=24A075940
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 8 and 9.at n=43A136909
• Fourth accumulation array, T, of the natural number array A000027, by antidiagonals.at n=50A185509
• Numbers with prime factorization pqrs^2t^2.at n=27A189989
• Triangle T(n,k) represents the coefficients of (x^17*d/dx)^n, where n=1,2,3,...at n=25A223519
• Rows of binary Walsh matrices interpreted as reverse binary numbers.at n=29A228539
• a(n) = binomial(5n+6, 4)/5 for n >= 0.at n=9A238471
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 633", based on the 5-celled von Neumann neighborhood.at n=34A273301
• G.f.: Sum_{n>=0} (n+1) * x^n * (1 + x^n)^n / (1 + x^(n+1))^(n+2).at n=44A326285
• a(n) = Sum_{k=1..n-1} lcm(lcm(n, k), lcm(n, n-k)).at n=27A338798
• Numbers k such that omega(k) = 5 and the largest prime factor of k equals the sum of its remaining distinct prime factors, where omega(k) = A001221(k).at n=33A383729