18053

Appears in sequences

• Graham-Sloane-type lower bound on the size of a ternary (n,3,4) constant-weight code.at n=36A030504
• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 16.at n=39A050965
• Irregular triangle read by rows: T(n, k) = number of inequivalent (mod the dihedral group D_8 of order 8) ways to place k nonattacking knights on an n X n board.at n=42A243716
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=24A273540
• Numbers k such that 3*10^k - 13 is prime.at n=19A295327
• a(n) is the greatest nonnegative number which has a partition into a triangular number (A000217), a square number (A000290), and a pentagonal number (A000326) in n different ways.at n=50A327792
• Number of tilings using squares, dominos, and flexible trominos of a strip of length n-1 and with an n-th cell placed on top of the middle of the strip.at n=17A374729