22028

Appears in sequences

• From substitutional generation of Kolakoski sequence (A000002).at n=23A042942
• McKay-Thompson series of class 20F for Monster.at n=24A058555
• n*10^2-1, n*10^2-3, n*10^2-7 and n*10^2-9 are all prime.at n=28A064976
• Binomial transform of reflected pentanacci numbers A074062: a(n) = Sum_{k=0..n} binomial(n,k)*A074062(k).at n=18A074825
• a(n) = n!*b(n) where b(n) = (b(n-2) + b(n-3))/(n*(n-1)), b(0) = b(1) = b(2) = 1.at n=15A123024
• Number of days after Mar 01 00 such that the date written the format MMDDYY (American standard, short) is palindromic.at n=17A210894
• Records in A224796.at n=36A224719
• Number of partitions p of n such that (number of even numbers in p) < (number of odd numbers in p).at n=41A241636
• Positions of Fibonacci numbers in ordered sequence A160009 of all products of Fibonacci numbers.at n=50A272948
• Expansion of (eta(q^4) * eta(q^5) / (eta(q) * eta(q^20)))^2 in powers of q.at n=24A298107
• Expansion of 1/q * chi(q) * chi(q^5) * chi(-q^20)^2 / chi(-q)^2 in powers of q where chi() is a Ramanujan theta function.at n=24A298116
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k cylinder up to horizontal and vertical reflections by a tile that is fixed under vertical reflections but not horizontal reflections.at n=30A368255
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k cylinder up to horizontal and vertical reflections by a tile that is fixed under 180-degree rotation but not horizontal or vertical reflections.at n=30A368256
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k cylinder up to horizontal reflection by an asymmetric tile.at n=33A368259
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k cylinder up to 180-degree rotation by an asymmetric tile.at n=33A368263