23356

Appears in sequences

• Row sums of triangle in A074829.at n=13A074878
• Number of two-sided n-step prudent walks ending at the northeast corner of their boxes, avoiding two consecutive west steps and south steps.at n=13A190794
• G.f. satisfies: A(x) = Sum_{n>=0} x^n * A(x)^(n*(n+1)/2) / Product_{k=1..n} (1 + x*A(x)^k).at n=11A221586
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 505", based on the 5-celled von Neumann neighborhood.at n=30A272583
• a(1)=1; thereafter, if n even, a(n) = a(n-1)-st prime, and if n odd, a(n) = a(n-1)-st nonprime.at n=12A280028
• Numbers t which satisfy the equation: t mod k = floor((t - k)/k) mod k (1 <= k <= t) only for k = 1 and t.at n=26A375007