20841

Appears in sequences

• Number of weighted voting procedures.at n=14A005256
• Numbers k that divide the (right) concatenation of all numbers <= k written in base 2 (most significant digit on left).at n=44A029447
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 96.at n=27A031594
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 80 ones.at n=19A031848
• Denominators of convergents to sqrt(e).at n=12A078737
• a(n) = number of m such that A080737(m) <= 2n.at n=45A080740
• Indices of primes in sequence defined by A(0) = 61, A(n) = 10*A(n-1) + 41 for n > 0.at n=18A101531
• Form the difference table of the sequence {2^k*k!}, then divide k-th column entries by 2^k*k!. Array read by ascending antidiagonals, T(n, k) for n, k >= 0.at n=40A143410
• Main diagonal of A143410.at n=4A143412
• a(n) = 12*n^2 - 8*n + 9.at n=41A167585
• Row sums of A273751.at n=32A274248
• Relative of Hofstadter Q-sequence: a(n) = max(0, n+20830) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0.at n=14A283887
• Base-10 version of A038103 interpreted as base 3.at n=26A350573