18247

Appears in sequences

• a(n) = n + (n+1)^2 + (n+2)^3 + (n+3)^4 + (n+4)^5.at n=3A027622
• Numbers n such that h(n) = 3 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=11A078420
• Concerning the popular MMORPG "Runescape" by JAGeX corporation, this sequence gives the number of experience points needed for a given level in a skill.at n=32A111078
• Number of permutations of 1..n containing the relative rank sequence { 136245 } at any spacing.at n=3A159103
• Number of partitions p of n such that (number of even numbers in p) < (number of odd numbers in p).at n=40A241636
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 0, a(1) = -1, a(2) = 0, a(3) = 1.at n=19A295735
• Number of nX3 0..1 arrays with every element unequal to 0, 1, 5 or 8 king-move adjacent elements, with upper left element zero.at n=15A304265
• Number of integer partitions of n where some part is the difference of two consecutive parts.at n=37A364467