20729

Appears in sequences

• Multiplicity of highest weight (or singular) vectors associated with character chi_14 of Monster module.at n=45A034402
• Recurrence sequence based on positions of digits in decimal places of 1/G, where G is Catalan's constant (also often called K).at n=13A098323
• Number of hierarchical orderings for n unlabeled elements with 2 possible classes for levels l>=2.at n=8A104460
• Number of nondecreasing strings of numbers x(i=1..n) in -3..3 with sum x(i)^3 equal to 0.at n=40A188271
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 675", based on the 5-celled von Neumann neighborhood.at n=24A273408
• Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600*H+60*MM+SS, is also prime.at n=18A295011
• Numbers k such that replacing each digit d in the decimal expansion of k with d^3 yields a prime each time, when done recursively three times.at n=11A316982
• a(n) is the number of ways to split [n] = {1,2,...,n} into two (possibly empty) complementary intervals {1,2,...,i} and {i+1,i+2,...,n} and then, if both intervals are nonempty, select 2 nonempty blocks/cells (i.e., subintervals) from each of them, or if one of the intervals is empty, select 2 nonempty blocks/cells from the nonempty interval.at n=19A353232